Product details introduction

1. Samson 3251 regulating valve
Nominal diameter DN15-DN500
Rated pressure PN16-PN400 CL150-CL2500
The standard control valve is suitable for a temperature range of -10 to+220 ℃
If an extension section or bellows seal is added, the temperature range can be extended to -200 to+550 ℃.
The valve stem seal adopts self-adjusting V-shaped PTFE packing or adjustable packing. If there are strict requirements for external leakage,
Seal with stainless steel bellows.

2. The 3251 type straight through single seat valve can be used with the following:
2.1 3271 type pneumatic actuator (3251-1 type control valve)
2.2 3277 type pneumatic actuator (3251-7 type control valve)

3. Valve body manufacturing materials:
3.1 Carbon Steel WN1.0619
3.3 Cast steel WN1.7357
3.4 Cast stainless steel WN1.4408

4. Valve core:
4.1 Metal Sealing IV
4.2 Soft seal VI
4.3 High performance metal seal V

5. The data for selecting and calculating pneumatic control valves is as follows:;
5.1 Pipeline pressure rating? texture of material?
5.2 Process medium?
5.3 State of process medium: liquid, gas, or vapor?
5.4 What are the maximum flow rate, normal flow rate, and minimum flow rate of the process medium?
5.5 What are the maximum inlet pressure, normal inlet pressure, and minimum inlet pressure of the process medium?
5.6 What are the maximum outlet pressure, normal outlet pressure, and minimum outlet pressure of the process medium?
5.7 Temperature of process medium?

6. Valve body
6.1 Nominal pressure/nominal diameter: DN/PN NPS/CL
6.2 Connection end: flange flat welding and butt welding
6.3 Valve Cover: Standard Short or Long Extension Short or Long Metal Bellows Sealed Hot Jacket
6.4 Valve Body/Cover Material: Forged Stainless Steel
6.5 Flow Characteristics: Linear Equal Percentage Switch
6.6 Valve core/stem material and guide sleeve/valve seat material
6.7 Surface hardening: No partial hardening of hard alloy, pure hard alloy hardening
6.8 Leakage level: IV V VI
6.9 Packing Material: Standard Special

7. Executing Agency
7.1 Model of actuator: Pneumatic
7.2 Effective area: CM2
7.3 Gas source pressure: minimum... maximum
7.4 Fault Safety Action: Fault Close Fault Open Fault Maintain Valve Position
7.5 Other types of actuators: electric, electric, hydraulic, manual operation
7.6 Fault safe position of three-way valve
7.7 Additional Handwheel: None

8. Locator options;
8.1 Samson 3730-X locator; Function options, single acting, double acting Is it equipped with feedback, solenoid valve, and valve position switch
8.2 Samson 3725-X locator; Function options, single acting, double acting
8.3 Samson 3767-X locator; Function options, single acting, double acting Is it equipped with feedback, solenoid valve, and valve position switch
8.4 Samson 3731-3/5 locator; Function options, single acting, double acting Is it equipped with feedback, solenoid valve, and valve position switch
8.5 Communication Protocol Options: HART, FF, PROFIBUS-PA
8.6 Explosion proof level options: Exia IICT6, Exd IICT6
8.7 Protection level options: IP65, IP66

9. Filter pressure reducing valve; Bring; Without;
9.1 Filter pressure reducing valve material aluminum alloy, 1/4NPT interface or 1/2NPT interface
Filter pressure reducing valve material stainless steel, 1/4NPT interface or 1/2NPT interface
9.2 Pressure gauge; Pressure range: 0-6.0 bar; without

10. Valve position switch type and functional options;
10.1 Valve position switch material; Synthetic resin; aluminium alloy; 316SS stainless steel;
10.2 Explosion proof level of valve position switch; No explosion-proof; Inherent safety explosion-proof Exia IICT6; Explosion proof Exd IICT6; Rubber seal explosion-proof
10.3 Bus network: FF with 2 Go Switch SPDT valve position switches
10.4 Bus Network: Profibus DP Valve Position Switch
10.5 Two 4 or 6 SPDT mechanical valve position switches; Silver plated contacts
10.6 2 or 4 SPDT mechanical valve position switches; Gold plated contacts
10.7 2 or 4 inductive valve position switches P+F
10.8 valve position switch with 4-20mA output
10.9 valve position switch with 4-20mA output and Hart protocol
10.10 Valve position switch extension shaft NAMUR
10.11 Valve position switch extended shaft long axis
10.12 Valve position switch cable interface 2 * 1/2NPT or 2 * 3/4NPT or 2 * 1/2NPT+2 * 3/4NPT
10.13 Valve position switch protection level IP54 IP66 IP67

11. Electromagnetic valve type options; Without; Equipped with single electronic control; Equipped with dual electronic controls;
11.1 Material of solenoid valve; aluminium alloy; copper alloy; 316SS stainless steel
11.2 Explosion proof grade of solenoid valve; No explosion-proof; Inherent safety explosion-proof Exia IICT6; Explosion proof Exd IICT6; Rubber seal explosion-proof
11.3 Electromagnetic valve voltage: 24VDC; 220VAC/50Hz:110VAC/60Hz ; Other voltages
11.4 Electromagnetic valve; 2-position/3-way type; 2-person/5-way type
11.5 Electromagnetic valve power consumption: 1.8W, 3.6W, 5.7W, 10W
11.6 Electromagnetic valve cable interface 1/2NPT, M20X1.5
11.7 Electromagnetic valve air supply interface 1/4NPT, 1/2NPT
Is the 11.8 solenoid valve equipped with a manual reset device MO, MS
11.9 Protection level of solenoid valve: IP54, IP65, IP67

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