The Siemens 257-02066B is a 3-way globe valve assembly with a pneumatic actuator designed for 1/2 in. piping. It features a Cv of 1, brass trim, NPT connections, and an actuator stroke of 7/32 in. Actuator control range is 3 to 8 psi with a 1/8 in. NPT barbed air connection. The valve is suitable for water, steam, and glycol solutions up to 50% and operates across a wide temperature range.
3-way globe valve, Cv 1, brass trim, NPT connections for 1/2 in. piping
Pneumatic actuator with 7/32 in. stroke, control range 3 to 8 psi, 1/8 in. NPT air connection
Suitable for water, steam, and glycol solutions up to 50%; operating temperature range 35 F to 250 F
Product Highlights
3-way pneumatic globe valve assembly, Cv 1, brass trim, 1/2 in. NPT connections, 3�8 psi actuator control
Product Information
Standard Information
Brand: SIEMENS
Manufacturer Part Number: 257-02066B
Country of Origin: United States of America
Technical Specifications
Brand
Siemens
Manufacturer Part Number
257-02066B
Valve Type
3-way globe valve
Pattern
Mix (3-way)
Connection Type
NPT
Size
1/2 in
Flow Coefficient (Cv)
1
Trim Material
Brass
Actuator Type
Pneumatic
Actuator Stroke
7/32 in.
Actuator Control Range
3 to 8 psi
Air Connection
1/8 in. NPT barbed fitting
Flow Characteristic
Linear
Close-Off Pressure
40 psi
Operating Temperature
35 F to 250 F (2 C to 120 C)
Service / Medium
Water, steam, glycol solutions up to 50%
Max Differential Pressure (Liquid)
25 psi
Max Inlet Pressure Absolute (Liquid)
400 psi
Fail-Safe
Spring Return
Control Signal / Compatibility
Pneumatic; compatible with Powermite electronic actuators (SFA/SFP, SSA/SSP) and 0-10 VDC proportional where applicable