Industrial control valve supplier | Instronline
                     Color profile: Disabled
Composite  Default screen
Series 3240
Globe Control Valve Type 3241 (241)
Pneumatic Control Valves Type 3241/3271 (241-1) and Type 3241/3277 (241-7)
Application
Control valve for process engineering and plants with industrial The control valves consist of a body with trim, bonnet and pneu-
requirements. matic actuator, optionally with metal bellows or insulating exten-
Nominal valve sizes ½” to 10” (15 to 250 mm) sion. The valves may be also equipped with electric, electrohy-
Pressure ratings ANSI Class 125 to 300 draulic, or hand-operated actuators, as well as control accesso-
Temperatures −320 °F to +800 °F (−196 °C to +427 °C) ries and other instrumentation.
Features
• Modular design, rugged and heavy duty construction, full
range of body and trim materials
• One-piece ultra-rigid valve bonnet and yoke up to size 6”
• Field retrofittable extension bonnets and metal bellows seals
• Many configurations, e.g. Cryogenic or ‘Lethal service’
• Self-adjusting, live-loaded PTFE V-ring stuffing box
• Port-guided V-port asymetric plugs above CV 20 standard
• Excellent dynamic response and high trim stability
• Self-locking seats, exchangeable for various CV values
• Low height, reversible, multi-spring/rolling diaphragm actuator
• NAMUR (IEC 534-6) accessory mounting standard
• Complete selection of actuators options, positioners and control
accessories
Fig. 1 ⋅ Type 3241/3271
Standard versions – available combinations: see Table 1 (Type 241-1);
• Body ASTM Cast A 126 Cl. B, A 216 WCB, A 351 CF8M, alter- sizes ½” to 10”
natively Forged A105 or A 182 F316 Fig. 2 ⋅ Type 3241/3277
• End connections ANSI Class 125 with FF-Flanges, Class 250 (Type 241-7)
Female threaded NPT, Class 150 or 300 with RF-Flanges Forged steel version;
• Packing PTFE V-ring spring-loaded/self-adjusting, temperature sizes ½” to 3”
range 15 °F to 430 °F (−10 °C to +220 °C)
• Trim equal percentage characteristic , metal-to-metal seal
Options
Fig. 3 ⋅ Type 3241/3271
• Body materials · optionally A 352 LCB, LC3, A 351 CF8, (Type 241-1)
CF3, Hastelloy, Monel, and others · On request with NPT thread;
• Packing · Adjustable PTFE, graphite or others · On request sizes ½” to 2”
• Extension bonnet module · For extreme temperatures –328 to
+842 °F (–200 to +450 °C) with PTFE packing
• Metal bellows seal module · For complete seal between pro-
cess and atmosphere, with test connection and PTFE packing Actuator combinations
• Characteristic · Linear (quick-opening on request) Type 3241/3271 (241-1) (Fig. 1) · With Type 271 Actuator
• Trim materials · Hardened, Hast. C, Monel, other versions (see T 8310)
• Plug seal · PTFE soft seal or lapped-in metal seal Type 3241/3277 (241-7) (Fig. 2) · With Type 3277 Actuator
• Flow dividers · For noise reduction · See Tech. Data Sheet T 8081 for integral positioner attachment (see T 8311)
• Pressure-balanced version · For high differential pressures Type 3241/3273 (241-3) · With Type 3273 (273) Hand-
• Heating jacket, double stuffing box, micro trim, versions for operated Actuator (see T 8312)
sour gas according to NACE · On request Type 3241/3274 (241-4) · With Type 3274 Electrohydraulic
Actuator (see T 8340)
DIN Versions · See Data Sheet T 8015 · JIS · On request
Associated Information Sheets Valves T 8000 Edition July 1998 ANSI Version
Actuators T 8300
Accessories T 8350 Technical Data Sheet T 8012
1
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:04:34 2000
Color profile: Disabled
Composite  Default screen
Fail-safe action
Depending on the arrangement of the diaphragm plate and
springs within the actuator, the control valve offers two different
fail-safe actions upon loss of air supply (see Technical Data
Sheets T 8310 and T8311 for details):
Actuator “extends”stem (fail-close)
The actuator springs close the valve upon loss of air supply.
Actuator “retracts” stem (fail-open)
The actuator springs open the valve upon loss of air supply.
Notes on the differential pressure tables 4a to 5d
The differential pressure tables listed have been prepared under
the following conditions:
– Process medium flow directed against the closing direction of
the valve plug (flow-to-open valve)
– Version with PTFE stuffing box
– With the maximum differential pressures specified, the leak-
age rates specified in Table 1 (ANSI/FCI – Class IV) are not ex-
ceeded.
– The differential pressure specified must not exceed the pressure
rating (see Pressure-Temperature Diagram).
– For valve sizes ½” to 3" with actuators containing an effective
diaphragm area of 700 cm2 (108 in2), the maximum permissi-
ble supply pressure is 60 psi (4 bar).
For versions with metal bellows seal, soft-sealed plugs and
p2 ≠ 0 psi (0 bar), consult SAMSON.
Fig. 5 ⋅ Type 3241 Globe Valve,
forged steel version (up to size 3”)
with metal bellows seal module
Fig. 4 ⋅ Type 3241 Globe Valve, sizes 12” to 6” with Fig. 6 ⋅ Type 3241 Globe Valve
Type 3271 Pneumatic Actuator size 8” to 10''
2 T 8012
2
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:04:47 2000
Color profile: Disabled
Composite  Default screen
Table 1 ⋅ Technical data
Nominal valve size in 1 ... 6 ½ ... 2 ½ ... 10 ½, 1, 1½, 2, 3 ½ ... 10 ½, 1, 1½, 2, 3
Body material, ASTM A 126 Class B A 216 Grade A 105 A 351 Grade A 182 Grade
(also see Table 2) WCB CF8M F316
End connection Flange Thread Flange Flange
Form of connection Flat Face NPT-F Raised Face1) Raised Face1)
Pressure rating, ANSI (B16.34) Class 125 250 150 or 300 300 150 or 300 300
Face-to-face dimension According to ANSI/ISA S-75.03 (Flanges according to ASME/ANSI B16.5)
Seat/plug seal Metal, soft or lapped-in metal
Packing design V-ring, spring-loaded, self-adjusting
Flow direction (standard) Flow to open (FTO)
Seat bore diameter, rated travel, CV/KVS See Table 3
Characteristic Equal percentage or linear
Terms for valve sizing according to ISA-
FL = 0.95, xT = 0.75 (at 75% rated travel)
S75.02 and IEC 60 534, parts 2-1 and 2-2
Rangeability 50:1 for sizes ½” ... 2” ⋅ 30:1 for sizes 2½” ... 10”
Dimensions and Weights See Tables 7, 8 and 9
Temperature ranges °F (°C) ⋅ Max. operating pressures acc. to pressure-temperature diagram (see Information Sheet T 8000-2)
Body without insulating section 15 ... 430 °F (−10 ... 220 °C)
Insulating Short -20 ... 445 °F (−29 ... 230 °C) -20 ... 800 °F (−29 ... 427 °C) -58 ... 800 °F (-50 ... 427 °C)
section Long – – -325 ... 800 °F (-198 ... 427 °C)
Body with
Bellows Short -20 ... 445 °F (−29 ... 230 °C) -20 ... 800 °F ( −29 ... 427 °C) -58 ... 800 °F (-50 ... 427 °C)
section Long – – -325 ... 800 °F (-198 ... 427 °C)
Un- Metal sealing −325 ... 840 °F (−196 ... 450 °C)
balanced Soft sealing −325 ... 428 °F (−196 ... 220 °C)
Valve plug
With PTFE ring −325 ... 428 °F (−196 ... 220 °C)
Balanced
With graph. ring +430 ... 800 °F (+220 ... 450 °C)
Leckage rate class according to ANSI/FCI F70-2 (IEC 60 534 Part 4)
Metal seal Class IV
Un-
PTFE soft sealed Class VI
Valve plug balanced
Lapped-in metal s. Class VI (IEC: IV-S2 ⋅ For 4” or above, Class IV-S1)
Balanced Metal sealed With PTFE balancing seal: Class IV ⋅ With graphite balancing seal: Class III
Metal-sealed plug PTFE soft-sealed plug Flow divider St I, Flow divider St III,
for cavitation pro- for noise reduction
tection with liquids with gases and
and noise reduction steam
with liquids, gases
Fig. 7 ⋅ Trim versions and steam
3 T 8012
3
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:04:55 2000
Color profile: Disabled
Composite  Default screen
Fig. 8 ⋅ Type 3241 Globe Valve components
80...81
80...81 3
2 82...84
82...84 9
10
9
8
10
6
8 32
14 15
15 26 39 12
13
12 4233 13
41 14
17
11
11 17
7 37 2
5 730 5
4
4
22
1 1
6
24
Metal bellows seal module
Nominal valve size ½” to 6'' Nominal size 8” and 10”
Nominal sizes ½” to 6'' (cast body available only)
Table 2 ⋅ Materials (WN = Material Number according to DIN)
Item Description ASTM/AISI Material Description
1 Body Gray Iron Carbon steel Carbon steel Stainless steel Monel (WN 9.4365)
(LC3, CF3, CF8, and Cast Cast A 216 WCB Cast Cast A 351 CF8M / Hastelloy C
others, on request) A 126 Cl.B Forged A 105 A 352 LCB Forged A 182 F316 (WN 9.4610)
2 Bonnet A 105 A 350 LF2 A 182 F316 Monel/Hastelloy C
3 Yoke, (8, 10”) A 395 (WN 0.7043) (per application)
4 Seat 1) AISI 410 (WN 1.4006) AISI 316Ti (WN 1.4571) Monel/Hastelloy C
5 Plug 1), 2) AISI 410 (WN 1.4006) AISI 316Ti (WN 1.4571) Monel/Hastelloy C
6 Plug stem AISI 410 (WN 1.4006) AISI 316Ti (WN 1.4571) Monel/Hastelloy C
7 Guide bushing AISI 430F (WN 1.4104) nitrided AISI 316Ti (WN 1.4571) nitr. Monel/Hastelloy C
8 Packing nut AISI 316Ti (WN 1.4571) with carbon insert (guide) Monel/Hastelloy C
9 Coupling nut AISI 430F (WN 1.4104)
10 Counter nut AISI 430F (WN 1.4104)
11 Spring AISI 301 (WN 1.4310) Monel/Hastelloy C
12 Washer AISI 316Ti (WN 1.4571) Monel/Hastelloy C
13 Body stud A 307 B A 193 B7 A 320 L7 A 193 B8M Cl.2 (per application)
14 Hex nut A 307 B A 193 B7 A 194 Gr.4 A194 8M (per application)
15 Packing PTFE-carbon composite (types A, B, C, H, W, and others on request)
17, 39 Gasket Graphite laminate with AISI 316Ti (WN 1.4571) core Graph. w/Hast.C
19 Packing spacer (2.5, 3”) AISI 316Ti (WN 1.4571) Monel/Hastelloy C
22 Extension A 105 A 350 LF2 A 182 F316 Monel/Hastelloy C
24 Guide bushing AISI 316Ti (WN 1.4571) Hastelloy C
30 Lock washer AISI 304 LN (WN 1.4122) Hastelloy C
32 Hex bolt A 193 B7 A 320 L7 A 193 B8M C12 (per application)
33 Hex nut A 193 B7 A 194 Gr.4 A 194 8M (per application)
37 Extended stem/bellows AISI 316Ti (WN 1.4571) Hastelloy C
41 Bellows retaining nut AISI 316Ti (WN 1.4571) Monel/Hastelloy C
42 Test connection nut AISI 316Ti (WN 1.4571) Monel/Hastelloy C
26, Label, indicator, bracket,
AISI 304 (WN 1.4301)
80…84 screw, nameplate, rivets
1) Seats and metal-sealing plugs also available with Stellite 6 facing; for nominal sizes ≤ 4”, plugs up to SB 48 mm also available of pure Stellite 6.
Seats and plugs of Monel (WN 2.4360), Hastelloy C (WN 2.4610), hard-metal (e.g. tungsten carbide, WN 1.4112) or others on request.
2) Soft-sealed plug version, with PTFE-glass fiber composite. Pressure-balanced and versions with flow dividers, materials on request.
4 T 8012
4
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:08 2000
Color profile: Disabled
Composite  Default screen
Table 3 ⋅ Cv and Kvs values
Table 3a ⋅ Overview
Cv 0.12 0.2 0.3 0.5 0.75 1.2 2 3 5 7.5 12 20 30 40 70 75 95 120 190 290 305 420 735
Cv I – 1.7 2.6 4.2 7 10.5 17 26 36 62 67 85 105 170 265 275 375 650
Cv III – 9 – 23 30 – 55 – 140 220 – 315 –
Seat ID, Ø in 0.12 0.24 0.47 0.95 1.22 1.5 1.9 2.48 3.15 3.94 4.92 5.12 5.91 7.87
Travel in 0.6 1.2 0.6 1.2 2.4 1.2 2.4
Kvs 0.1 0.16 0.25 0.4 0.63 1.0 1.6 2.5 4.0 6.3 10 16 25 35 60 63 80 100 160 250 260 360 630
Kvs I – 1.45 2.2 3.6 5.7 9 14.5 22 31 54 57 72 90 144 225 234 320 560
Kvs III – 7.5 – 20 26 – 47 – 120 190 – 270 –
Seat ID, Ø mm 3 6 12 24 31 38 48 63 80 100 125 130 150 200
Travel mm 15 30 15 30 60 30 60
Table 3b ⋅ Standard versions (without flow divider) ⋅ Versions in shadowed fields are also available with balanced valve plugs.
Cv 0.12 0.2 0.3 0.5 0.75 1.2 2 3 5 7.5 12 20 30 40 70 75 95 120 190 290 305 420 735
Kvs 0.1 0.16 0.25 0.4 0.63 1.0 1.6 2.5 4.0 6.3 10 16 25 35 60 63 80 100 160 250 260 360 630
Size in mm
½ 15 • • • • • • • • •
¾ 20 • • • • • • • • • •
1 25 • • • • • • • • • • •
1½ 40 • • • • • • • • • •
2 50 • • • • • • • • • • •
2½ 65 • • •
3 80 • • • •
4 100 • • •
6 150 • • • •
8 200 • • •
10 250 • • •
Table 3c ⋅ Versions with St I flow divider (CvI/KvsI) ⋅ Versions in shadowed fields are also available with balanced valve plugs.
CvI – 1.7 2.6 4.2 7 10.5 17 26 36 62 67 85 105 170 265 275 375 650
KvsI – 1.45 2.2 3.6 5.7 9 14.5 22 31 54 57 72 90 144 225 234 320 560
Size in mm
½ 15 • • •
¾ 20 • • •
1 25 • • •
1½ 40 • • • •
2 50 • • • • •
2½ 65 • • •
3 80 • • • •
4 100 • • •
6 150 • • •
8 200 • • •
10 250 • • •
Table 3d ⋅ Versions with St III flow divider (CvIII/KvsIII) ⋅ Versions in shadowed fields are also available with balanced valve plugs.
CvIII – 9 – 23 30 – 55 – – 140 220 – 315 –
KvsIII – 7.5 – 20 26 – 47 – – 120 190 – 270 –
Size in mm
½ 15
¾ 20
1 25
1½ 40
2 50 •
2½ 65 • •
3 80 • •
4 100 •
6 150 • •
8 200 • •
10 250 • •
5 T 8012
5
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:10 2000
Color profile: Disabled
Composite  Default screen
Table 4 ⋅ Differential pressure tables ⋅ Unbalanced valve plugs
Values specified in the shadowed columns correspond to the standard application, i.e. to rated travel ⋅ Differential pressures specified in the white columns
apply to maximum pre-stressed springs (max. bench setting range).
Differential pressures enclosed in parentheses refer to mid-travel position.
Observe the notes on the differential pressure tables, listed on page 2.
Table 4a ⋅ Permissible differential pressures ∆p ⋅ Pressures in psi
For actuators employing fail-safe action: Actuator “extends” stem ⋅ Valve closed at supply pressure 0 psi
37 4...17 9...33 13...48 – –
Bench range 9...451)
18.5, 54, 3...15 6...30 – – 20...34 30...48
(psi) 6...18 (26...45)108 (18...30) 12...36 18...52 (26...34) (39...50)
for actuators with
217 – 7...36 – 15...45
effective area (in2): – – –
434 12...18 – 30...45 23...35 – 34...52 –
Required supply pressure (psi) 18 21 33 39 38 47 55 47 38 55
DN Actuator
Cv Kvs ∆p with p2 = 0 psi
in mm in2 cm2
½” 15 0.12 0.1 18.5 120 320 – 580 – – – – – – –
to to to to
1” 25 0.3 0.25 37 240 580 580 – – – – – – – –
0.5 0.4 18.5 120 320 – 580 – – – – – – –
to to
½” 15 1.2 1.0 37 240 580 580 580 – – – – – – –
to to 2 1.6 18.5 120 130 – 405 – – – – – 580 –
2” 50
3 2.5 37 240 406 580 580 – 580 580 580 – – –
5 4 54 350 580 580 580 – 580 580 – – 580 –
18.5 120 – – 80 – – – – – 435 580
¾” 20 7.5 6.3 37 240 75 135 215 – 350 350 565 – – –
to to
2” 50 54 350 145 350 350 – 550 550 580 – 580 58012 10
108 700 350 – (580) – – – – – – –
18.5 120 – – 44 – – – – – 260 405
1½” 40 37 240 36 75 115 – 200 200 335 – – –
and and 20 16
2” 50 54 350 75 195 195 – 435 320 580 580 580
108 700 195 – (580) – – (580) – – – –
18.5 120 – – 22 – – – – – 175 275
112” 40 37 240 19 45 72 – 130 130 218 – – –
to to 30 25
3” 80 54 350 45 125 125 – 290 200 450 – 535 580
108 700 126 – (580) – – (580) – – – –
2” 50 37 240 – – 43 – 72 72 130 – – –
to to 40 35 54 350 23 72 72 – 175 123 275 – 330 507
3” 80 108 700 72 – (580) – – (580) – – – –
2½” 65 37 240 – – 20 – 40 40 72 – – –
and and 70 60 54 350 12 39 39 – 94 65 152 – 190 290
3” 80 108 700 39 – (333) – – (507) – – (520) (580)
37 240 – – 9 – 22 22 40 – – –
3” 80 95 80 54 350 – 20 20 – 58 339 94 – 115 174
108 700 20 – 20 – – (305) – – (320) (475)
4” 100 75 63 108 700 38 94 94 – 217 152 333 – 390 580
4” 100 120 100 108 700 20 58 58 – 130 94 203 – 239 362
4”, 100,
190 160 108 700 10 33 33 – 80 58 123 – 152 225
6” 150
6” 150 305 260 108 700 4.4 17 17 – 43 32 85 – 85 135
217 1400 – 49 49 64 110 – – 139 – –
290 250
434 2800 – 230 – 580 470 – 580 – – –
8” 200 217 1400 – 33 33 43 74 – – 95 – –
and and 420 360
10” 250 434 2800 – 157 – 410 325 – 490 – – –
217 1400 – – – 23 41 – – 52 – –
735 630
434 2800 – 87 – 229 181 – 276 – – –
1) Not for actuator with effective area 18.5” (120 cm2)
6 T 8012
6
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:11 2000
Color profile: Disabled
Composite  Default screen
Table 4b ⋅ Permissible differential pressures ∆p ⋅ Pressures in bar
For actuators employing fail-safe action: Actuator “extends” stem ⋅ Valve fully closed at supply pressure 0 bar
240 0.3...1.1 0.6...2.2 0.9...3.3 – –
Bench range 0.6...3.01)
120,350, 0.2...1.0 0.4...2.0 – –
(bar) 0.4...1.2 (1.8...3.0)
1.4...2.3 2.1...3.3
700 (1.2...2.0) 0.8...2.4 1.2...3.6 (1.85...2.3) (2.7...3.3)
for actuators with
1400 – 0.5...2.5 1.0...3.0
effective area (cm2): – – – –
2800 0.8...1.2 – 2.0...3.0 1.6...2.4 2.4...3.6 –
Required supply pressure (bar) 1.2 1.4 2.2 2.7 2.6 3.2 3.8 3.2 2.5 3.5
Size Actuator
Cv Kvs ∆p with p2 = 0 bar
in mm in2 cm2
½” 15 0.12 0.1 18.5 120 40 – 40 – – – – – – –
to to to to
1” 25 0.3 0.25 37 240 40 40 – – – – – – – –
0.5 0.4 18.5 120 22 – 40 – – – – – – –
to to
½” 15 1.2 1.0 37 240 40 40 40 – – – – – – –
to to 2 1.6 18.5 120 9 – 28 – – – – – 40 –
2” 50
3 2.5 37 240 28 40 40 – 40 40 40 – – –
5 4 54 350 40 40 40 – 40 40 – – 40 –
18.5 18.5 – – 5.5 – – – – – 30 40
¾” 20 7.5 6.3 37 240 5.2 9.3 14.8 – 24 24 39 – – –
to to
2” 50 54 350 10 24 24 – 38 38 40 – 40 4012 10
108 700 24 – (40) – – – – – – –
18.5 120 – – 3 – – – – – 18 28
1½” 40 37 240 2.5 5.2 8.0 – 14 14 23 – – –
and and 20 16
2” 50 54 350 5.2 13.5 13.5 – 30 22 40 40 40
108 700 13.5 – (40) – – (40) – – – –
18.5 120 – – 1.5 – – – – – 12 19
1½” 40 37 240 1.3 3.1 5.0 – 9.0 9.0 15 – – –
to to 30 25
3” 80 54 350 3.1 8.5 8.5 – 20 14 31 – 37 40
108 700 8.7 – (40) – – (40) – – – –
2” 50 37 240 – – 3.0 – 5.0 5.0 9.0 – – –
to to 40 35 54 350 1.6 5.0 5.0 – 12 8.5 19 – 23 35
3” 80 108 700 5.0 – (40) – – (40) – – – –
2½” 65 37 240 – – 1.4 – 2.8 2.8 5.0 – – –
and and 70 60 54 350 0.8 2.7 2.7 – 6.5 4.5 10.5 – 13 20
3” 80 108 700 2.7 – (23) – – (35) – – (36) (40)
37 240 – – 0.6 – 1.5 1.5 2.8 – – –
3” 80 95 80 54 350 – 1.4 1.4 – 4.0 2.7 6.5 – 8 12
108 700 1.4 – 1.4 – – (21) – – (22) (33)
4” 100 75 63 108 700 2.6 6.5 6.5 – 15 10.5 23 – 27 40
4” 100 120 100 108 700 1.4 4.0 4.0 – 9.0 6.5 14 – 16.5 25
4”, 100,
190 160 108 700 0.7 2.3 2.3 – 5.5 4.0 8.5 – 10.5 15.5
6” 150
6” 150 305 260 108 700 0.3 1.2 1.2 – 3.0 2.2 6.0 – 6.0 9.5
217 1400 – 3.4 3.4 4.4 7.5 – – 9.6 – –
290 250
434 2800 – 15.8 – 40 32.4 – 40 – – –
8” 200 217 1400 – 2.3 2.3 3.0 5.1 – – 6.6 – –
and and 420 360
10” 250 434 2800 – 10.8 – 28.2 22.4 – 33.9 – – –
217 1400 – – – 1.6 2.8 – – 3.6 – –
735 630
434 2800 – 6 – 15.8 12.5 – 19 – – –
1) Not for actuator with effective area 120 cm2 (18.5 in2)
7 T 8012
7
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:13 2000
Color profile: Disabled
Composite  Default screen
Table 4c ⋅ Permissible differential pressures ∆p
For actuators employing fail-safe action: Actuator “retracts” stem ⋅ Valve closed at required supply pressure
Table 4c ⋅ Pressures in psi
Bench range (bar/psi) 18.5 ... 434 3 ... 15
for actuators with 217 (6 ... 30)
effective area (in2): 434 (4 ... 15)
Required supply pressure (bar/psi) 18 36 58
Size Cv Kvs Actuator ∆p with p2 = 0 psi
in mm in2 cm2
½” 15 0.12 0.1 18.5 120 330 580 –
to to to to
1” 25 0.3 0.25 37 240 580 – –
0.3 0.4 18.5 120 330 580 –
to to
½” 15 1.2 1.0 37 240 580 580 –
to to 2 1.6 18.5 120 130 580 –
2” 50
3 2.5 37 240 410 580 –
5 4 54 350 580 580 –
18.5 120 10 450 580
¾” 20 7.5 6.3 37 240 80 580 580
to to
2” 50 54 350 145 580 58012 10
108 700 350 580 –
18.5 120 – 260 580
1½” 40 37 240 35 540 580
and and 20 16
2” 50 54 350 75 580 580
108 700 200 580 –
18.5 120 – 160 410
1½” 40 37 240 20 350 580
to to 30 25
3” 80 54 350 45 540 580
108 700 130 580 580
2” 50 37 240 10 220 490
to to 40 35 54 350 25 330 580
3” 80 108 700 75 580 580
2½” 65 37 240 – 120 290
and and 70 60 54 350 10 190 420
3” 80 108 700 40 390 580
37 240 – 75 170
3” 80 95 80 54 350 5 110 260
108 700 20 230 540
4” 100 75 63 108 700 40 390 580
4” 100 120 100 108 700 20 230 520
4” 100
and and 190 160 108 700 10 145 330
6” 150
6” 150 305 260 108 700 5 85 200
217 1400 20 200 440
290 250
434 2800 50 410 580
8” 200 217 1400 – 140 300
and and 420 360
10” 250 434 2800 35 280 580
217 1400 – 75 170
735 630
434 2800 – 160 350
8 T 8012
8
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:14 2000
Color profile: Disabled
Composite  Default screen
Tables 4d ⋅ Permissible differential pressures ∆p
For actuators employing fail-safe action: Actuator “retracts” stem ⋅ Valve closed at required supply pressure
Table 4d ⋅ Pressures in bar
Bench range (bar/psi) 120 ... 2800 0.2 ... 1.0
for actuators with 1400 (0.4 ... 2.0)
effective area (cm2): 2800 (0.3 ... 1.0)
Required supply pressure (bar/psi) 1.2 2.4 4
Size Cv Kvs Actuator ∆p with p2 = 0 bar
in mm in2 cm2
½” 15 0.12 0.1 18.5 120 23 40 –
to to to to
1” 25 0.3 0.25 37 240 40 – –
0.3 0.4 18.5 120 23 40 –
to to
½” 15 1.2 1.0 37 240 40 40 –
to to 2 1.6 18.5 120 9 40 –
2” 50
3 2.5 37 240 28 40 –
5 4 54 350 40 40 –
18.5 120 0.6 31 40
¾” 20 7.5 6.3 37 240 5.2 40 40
to to
2” 50 54 350 10 40 4012 10
108 700 24 40 –
18.5 120 – 18 40
1½” 40 37 240 2.5 37 40
and and 20 16
2” 50 54 350 5.2 40 40
108 700 13.5 40 –
18.5 120 – 11 28
1½” 40 37 240 1.3 24 40
to to 30 25
3” 80 54 350 3.1 37 40
108 700 8.7 40 40
2” 50 37 240 0.5 15 34
to to 40 35 54 350 1.6 23 40
3” 80 108 700 5.0 40 40
2½” 65 37 240 – 8.5 20
and and 70 60 54 350 0.6 13 29
3” 80 108 700 2.7 27 40
37 240 – 5.0 12
3” 80 95 80 54 350 0.2 7.8 18
108 700 1.4 16 37
4” 100 75 63 108 700 2.6 27 40
4” 100 120 100 108 700 1.4 16 36
4” 100
and and 190 160 108 700 0.7 10 23
6” 150
6” 150 305 260 108 700 0.3 6.0 13.5
217 1400 1.3 13.7 30.3
290 250
434 2800 3.4 28.3 40
8” 200 217 1400 – 9.5 21.0
and and 420 360
10” 250 434 2800 2.3 19.5 40
217 1400 – 5.2 11.7
735 630
434 2800 – 10.9 23.9
9 T 8012
9
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:15 2000
Color profile: Disabled
Composite  Default screen
Table 5 ⋅ Differential pressure tables ⋅ Balanced valve plugs with PTFE balancing seal (without bellows)
Values specified in the shadowed columns correspond to the standard application, i.e. to rated travel ⋅ Differential pressures specified in the white columns
apply to maximum pre-stressed springs (max. bench setting range).
Fail-safe action: Actuator “extends” stem ⋅ Valve closed at supply pressure 0 psi (0 bar)
Fail-safe action: Actuator “retracts” stem ⋅ Valve closed at required supply pressure
Tables 5a and 5b ⋅ Permissible differential pressures ∆p ⋅ Pressures in psi
Table 5a ⋅ Actuator “extends” stem Table 5b ⋅ Stem “retracts”
Bench range psi 3...15 6...18 6...30 12...36 3...15 3...15 6...30
Required supply pressure psi 18 21 33 39 18 18 33
Size Actuator
Cv Kvs ∆p with p2 = 0 psi
in mm in2 cm2
2½” 65 54 350 – 580 580 580 – 580 580
70 60
3” 80 108 700 580 580 – – 580 – –
54 350 – 580 580 580 – 580 580
3” 80 95 80
108 700 580 580 – – 580 – –
4” 100 75 63 108 700 440 580 580 580 440 580 580
4” 100
190 160 108 700 – 580 580 580 170 580 580
6” 150
6” 150 305 260 108 700 – 580 580 580 – 580 580
Tables 5c and 5d ⋅ Permissible differential pressures ∆p ⋅ Pressures in bar
Table 5c ⋅ Actuator “extends” stem Table 5d ⋅ Stem “retracts”
Bench range bar 0.2...1.0 0.4...1.2 0.4...2.0 0.8...2.4 0.2...1.0 0.2...1.0 0.4...2.0
Required supply pressure bar 1.2 1.4 2.2 2.6 1.2 2.0 3.0
Size Actuator
Cv Kvs ∆p with p2 = 0 bar
in mm in2 cm2
2½” 65 54 350 – 40 40 40 – 40 40
70 60
3” 80 108 105 40 40 – – 40 – –
54 350 – 40 40 40 – 40 40
3” 80 95 80
108 700 40 40 – – 40 – –
4” 100 75 63 108 700 30 40 40 40 30 40 40
4” 100
190 160 108 700 – 40 40 40 12 40 40
6” 150
6” 150 305 260 108 700 – 40 40 40 – 40 40
Fig. 9 ⋅ Version with pressure-balanced plug and bonnet
10 T 8012
10
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:19 2000
Color profile: Disabled
Composite  Default screen
Table 6 ⋅ Differential pressure tables ⋅ Balanced valve plugs with PTFE balancing seal with metal bellows seal
Values specified in the shadowed columns correspond to the standard application, i.e. to rated travel ⋅ Differential pressures specified in the white
columns apply to maximum pre-stressed springs (max. bench setting range).
Differential pressures enclosed in parentheses refer to mid-travel position.
Fail-safe action: Actuator “extends” stem ⋅ Valve closed at supply pressure 0 psi (0 bar)
Fail-safe action: Actuator “retracts” stem ⋅ Valve closed at required supply pressure
Tables 6a and 6b ⋅ Permissible differential pressures ∆p ⋅ Pressures in psi
Table 6a ⋅ Actuator “extends” stem Table 6b ⋅ Stem “retracts”
6...30
Bench range psi 3...15 6...18 12...36 9...45 18...52 3...15 6...30 9...45
(18...30)
Required supply pressure psi 18 21 33 39 48 55 18 44 60
Size Actuator
Cv Kvs ∆p with p2 = 0 psi
in mm in2 cm2
2½” 65 54 350 – 250 250 580 520 580 – – 580
70 60
3” 80 108 700 250 580 (580) – – – 250 580 –
54 350 – 170 174 580 450 580 – – 580
3” 80 95 80
108 700 170 580 (580) – – – 170 580 –
4” 100 75 63 108 700 75 250 250 580 440 580 75 – 580
4” 100
190 160 108 700 – 200 200 550 380 580 20 – 540
6” 150
6” 150 305 260 108 700 – 160 160 510 330 580 – – 580
Tables 6c and 6d ⋅ Permissible differential pressures ∆p ⋅ Pressures in bar
Table 6c ⋅ Actuator “extends” stem Table 6d ⋅ Stem “retracts”
0.4...2.0
Bench range bar 0.2...1.0 0.4...1.2 0.8...2.4 0.6...3.0 1.2...3.6 0.2...1.0 0.4...2.0 0.6...3.0
(1.2...2)
Required supply pressure bar 1.2 1.4 2.2 2.6 3.2 3.8 1.2 3.0 4.0
Size Actuator
Cv Kvs ∆p with p2 = 0 bar
in mm in2 cm2
2½” 65 54 350 – 17 17 40 36 40 – – 40
70 60
3” 80 108 700 17 40 (40) – – – 17 40 –
54 350 – 12 12 40 31 40 – – 40
3” 80 95 80
108 700 12 40 (40) – – – 12 40 –
4” 100 75 63 108 700 5.0 17 17 40 30 40 5.0 – 40
4” 100
190 160 108 700 – 14 14 38 26 40 1.5 – 40
6” 150
6” 150 305 260 108 700 – 11 11 35 23 40 – – 40
11 T 8012
11
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:20 2000
Color profile: Disabled
Composite  Default screen
Table 7a ⋅ Dimensions of the standard versions in inches
in ½” ¾” 1” 1½” 2” 2½” 3” 4” 6” 8” 10”
Globe valve Size
NPT ½ ¾ 1 1½ 2 –
125/150 in 7.25 7.25 7.25 8.75 10.0 10.87 11.75 13.87 17.75 21.38 26.5
Length L
Class 300 in 7.50 7.62 7.75 9.25 10.50 11.50 12.50 14.50 18.62 22.38 27.88
Length L1 Class 250 in 6 6 6 8 9.25 –
2
H1 ≤ 700 cm in 8.6 10.2 13.8 15.3 –
actuators with 1400 cm2 in – 31.7
effective area: 2800 cm2 in – 41.7
H2 (approximately) in 1.8 2.8 3.8 4.5 6.9 9.3 10.2
H2 (approx.), forged steel in 2.1 – 2.7 3.6 3.8 – 5.0 –
Size 120 240 350 700 1400 2800
Pneumatic actuator
in2 18.5 37 54 108 217 434
Diaphragm ∅ D in 6.6 9.5 11.0 15.4 20.9 30.3
H in 2.7 2.6 3.4 5.3 11.3 19.5
H3 1) in 4.3 7.5 24.0 25.5
Thread M 30 x 1.5 M 60 x 1.5 M 100 x 2
a (for Type 3271 Actuator) 2) NPT 1 NPT 1 NPT 3 38 4 8 NPT 4 NPT 1
a2 (for Type 3277 Actuator) 2) – NPT 38 –
1) Minimum clearance for actuator disassembly (for both Types 3271 and 3277)
2) ISO G (straight) thread also available, on request
Table 8a ⋅ Weights in lbs
Globe valve Size inch ½” 34” 1” 1½” 2” 2½” 3” 4” 6” 8” 10”
Weight, without actuator lbs 11 13 15 26 33 53 66 92 264 728 840
Size 120 240 350 700 1400 2800
Pneumatic actuator
in2 18.5 37 54 108 217 434
Weight of Type 271 lbs 6.6 11 18 48.5 154 990
Weight of Type 3277 lbs 7.7 20 26.5 57.5 –
ØD
H3 a
ØD
H3 ØD H3a aH
H H
100
H1
H1 a2
H1
NPT
H2
H2 H2
L L1
L L
Type 3241/3271 ⋅ ½” to 6” Type 3241/3271 ⋅ 8” and 10” Type 3241/3277 ⋅ ½” to 6” Type 3241 ⋅ NPT ½" to 2"
12 T 8012
12
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:27 2000
Color profile: Disabled
Composite  Default screen
Table 7b ⋅ Dimensions of the standard versions in mm
in ½” ¾” 1” 1½” 2” 2½” 3” 4” 6” 8” 10”
Globe valve Size mm 15 20 25 40 50 65 80 100 150 200 250
NPT ½ ¾ 1 1½ 2 –
125/150 mm 184 184 184 222 254 276 298 352 451 543 673
Length L
Class 300 mm 191 194 197 235 267 292 318 368 473 568 708
Length L1 Class 250 mm 152.4 152.4 152.4 203.2 235 –
2
H1 ≤ 700 cm mm 220 260 350 390 –
actuators with 1400 cm2 mm – 805
effective area: 2800 cm2 mm – 1060
H2 (approximately) mm 45 72 98 113 175 235 260
H2 (approx.) forged steel mm 53 – 70 92 98 – 128 –
Pneumatic actuator cm2 120 240 350 700 1400 2800
Diaphragm ∅ D mm 168 240 280 390 530 770
H mm 69 65 85 134 287 620
H3 1) mm 110 190 610 648
Thread M 30 x 1.5 M 60 x 1.5 M 100 x 2
a (for Type 3271 Actuator) 2) NPT 1 NPT 18 4 NPT 38 NPT 34 NPT 1
a2 (for Type 3277 Actuator) 2) – NPT 38 –
1) Minimum clearance for actuator disassembly (for both Types 3271 and 3277)
2) ISO G (straight) thread also available, on request
Table 8b ⋅ Weights in kg
in ½” 34” 1” 1½” 2” 2½” 3” 4” 6” 8” 10”
Globe valve Size
mm 15 20 25 40 50 65 80 100 150 200 250
Weight, without actuator kg 5 6 7 12 15 24 30 42 120 330 380
Pneumatic actuator cm2 120 240 350 700 1400 2800
Weight of Type 3271 kg 3 5 8 22 70 450
Weight of Type 3277 kg 3.5 9 12 26 –
ØD
H3 a
ØD
H3 ØD H3a aH
H H
100
H1
H1 a2
H1
NPT
H2
H2 H2
L L1
L L
Type 3241/3271 ⋅ ½” to 6” Type 3241/3271 ⋅ 8” and 10” Type 3241/3277 ⋅ ½” to 6” Type 3241 ⋅ NPT ½" to 2"
13 T 8012
13
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:33 2000
Color profile: Disabled
Composite  Default screen
Table 9 ⋅ Dimensions and weights of special versions with insulating section or metal bellows seal ⋅ (without actuator)
Table 9a ⋅ Nominal sizes ½” to 6” and NPT ½” to 2” in inches and lbs
Globe valve Size/NPT in ½” ¾” 1” 1½” 2” 2½” 3” 4” 6”
Short insul.
in 15.9 15.5 17.1 25 25.8
Height or bell. sect.
H4 Long. insul.
in 27.9 27.9 29.1 34.5 35.2
or bell. sect.
Approximate weight lbs 18 20 22 40 46 71 84 132 330
Table 9b ⋅ Nominal sizes 8” and 10” in inches and lbs
Version with Insulating section Metal bellows section
Size 1400 2800 1400 2800
Pneumatic actuator
in2 217 434 217 434
H4 for nom. sizes 8”, 10” in 49.2 58.3 57.2 66.4
Approximate weight in 8” 840 885 860 905
lbs for nominal sizes 10” 950 995 970 1015
Table 9c ⋅ Nominal sizes ½” to 6” and NPT ½” to 2” in mm and kg
in ½” ¾” 1” 1½” 2” 2½” 3” 4” 6”
Globe valve Size/NPT
mm 15 20 25 40 50 65 80 100 150
Short insul.
mm 405 395 435 635 655
or bell. sect.
Height H4
Long. insul.
mm 710 710 740 875 895
or bel. sect.
Approximate weight kg 8 9 10 18 21 32 38 60 150
Table 9d ⋅ Nominal sizes 8” and 10” in mm and kg
Version with Insulating section Metal bellows section
Pneumatic actuator cm2 1400 2800 1400 2800
H4 for sizes 200, 250 mm 1250 1480 1453 1687
Approximate weight in 200 380 400 390 410
kg for nominal sizes 250 430 450 440 460
Dimensions and weights of versions with heating jacket are available on request.
Type 3241 (241) Globe Valve with insulating section or metal bellows seal
H4
H4
H4
Sizes ½” to 6” Sizes 8” and 10” NPT ½” to 2”
14 T 8012
14
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:42 2000
Color profile: Disabled
Composite  Default screen
Pressure-Temperature Diagram
According to ASME/ANSI B16.34, Cast Iron according to B16.1 (Flanged) and B16.4 (NPT)
For reference only. For exact values, consult the respective ANSI standard.
[bar] [psi] A 126 B A 216 WCB A 351 CF8M
900
60
Class 300
50
700
40
Class 300
500
30
Class 250
300
20 Class 150
10
100 Class 125
Class 150 [˚F]
-325 -200 -100 -60 -20 0 32 100 200 400 430 600 800 850
t
-196 -100 -50 0 100 200 300 400 427 [˚C]
Short
Long insulating section insul. Without insulating section Short insulating section
section
Long bellows section
Short bellows section
Installation
Arbitrary mounting orientation. If the mounting orientation is
inclined, the actuator and valve must be supported. Observe
the clearance is adequate to allow actuator, bonnet and plug re-
moval (H3 in the table of dimensions). Direction of flow as indi-
cated by the arrow on the valve body
Registered Trade Marks
Monel, Hastelloy, and Stellite are referred to within this publica-
tion with the understanding that the names are Registered Trade
Marks of their respective owners, which include Cabot Wrought
Products, International Nickel Co., Carpenter Technology, or the
rightful owner, in the past as well as in future cases.
15 T 8012
15
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:45 2000
Color profile: Disabled
Composite  Default screen
Ordering information
Globe Control Valve Type 3241 (241):
Nominal valve size1) …
Body material ASTM …
Pressure rating ANSI Class …
CV-/K 1)VS-value … Characteristic …
Options/Special version …
Special testing/preparation …
Actuator:
Type … Ordering information 5) …
Fail-safe position …
Operating conditions 2):
Process fluid 3) … Flow rate 4) …
Inlet pressure … Outlet pressure 4) …
Temperature …
Maximum shutoff ∆p for actuator sizing …
Air/power supply available for actuator, max./min. …
Accessories:
Positioner, Switches, Transmitter, Solenoid valve, Filter/regulator,
Bypass, Volume/pressure amplifier, Lockup relay …
Type … Ordering information 5) …
Tubing and fittings type/material …
Other instrumentation:
Controllers, Sensors, Transmitters, Transducers, Converters …
Type … Ordering information 5) …
Notes:
1) If nominal size or CV-/KVS-value unknown, specify operating
conditions
2) Specify system of units, pressures: specify gauge or absolute
Provide minimum, normal, and maximum values, where applicable.
Gases, vapors: specify flow rate under standard or actual conditions
3) Non-standard process fluids, specify additionally:
Density, Specific gravity, or Molecular weight …
Liquids: Vapor pressure, Critical pressure, Viscosity …
Gases, Vapors: Ratio of specific heats, Compressibility factor
4) Or, specify required valve flow coefficient CV, KVS …
5) Ordering information per the applicable Technical Data Sheet.
Specifications subject to change without notice.
SAMSON CONTROLS INC. SAMSON CONTROLS INC.
1-105 Riviera Drive 4111 Cedar Boulevard
Markham ⋅ Ontario ⋅ Canada ⋅ L3R 5J7 Baytown ⋅ Texas ⋅ USA ⋅ 77520-8588
Tel. (905) 474 -0354 ⋅ Telefax (905) 474 -0998 Tel. (281) 383 -3677 ⋅ Telefax (281) 383 -3690 T 8012
16
C:\Samson\ca\T8012CA.vp
Mon Feb 28 13:05:46 2000
T 8012 CA