Fisher Type 3722 Pneumatic Valve Positioner – Direct Mount

The Fisher Type 3722 Pneumatic Valve Positioner from Emerson Process Management provides precise valve actuator control based on pneumatic input signals. Engineered for direct mounting on rotary and select linear actuators, the 3722 uses a mechanical cam feedback system to regulate output pressure in response to changes in the input signal.

This positioner supports standard pneumatic input signals of 3–15 psi (0.2 to 1.0 bar), with optional ranges up to 6–30 psi to suit customized applications. It delivers a regulated pneumatic output to the actuator using an internal relay, ensuring accurate and stable valve positioning. The mechanical feedback mechanism, combined with visible analog indicators, allows for reliable field operation and monitoring.

Certified for use in hazardous areas, the Fisher 3722 carries FM, CSA, and optional ATEX/IECEx approvals. Its rugged housing is rated IP66 for resistance against dust and powerful water jets, making it ideal for harsh industrial environments. Constructed with an epoxy-coated aluminum body, stainless steel cam components, and Buna-N or Viton seals, it offers durability across a wide ambient temperature range from -40°C to +82°C.

Specifications:

– Product Name: Pneumatic Valve Positioner
– Model: Type 3722
– Manufacturer: Fisher (Emerson Process Management)
– Serial Number: 1752617
– Function: Pneumatic control of valve actuator position
– Design: Cam-driven pneumatic positioner
– Mounting: Direct actuator mounting (rotary or linear valves)
– Input Signal Type: Pneumatic
– Standard Input Range: 3–15 psi (0.2 to 1.0 bar)
– Optional Input Ranges: 6–30 psi or custom
– Output Signal: Pneumatic output to actuator (internally regulated)
– Valve Position Feedback: Mechanical cam system with analog gauge indicators
– Supply Pressure: 20 to 100 psi (1.4 to 7.0 bar), depending on actuator requirements
– Air Connections: 1/4" NPT (standard)
– Air Consumption: Approx. 0.06 scfm at 20 psi supply
– Position Feedback: Mechanical cam follower for linear or rotary tracking
– Explosion Protection:
 – FM Approved (Class I, Div. 1 & 2, Groups B, C, D)
 – CSA Certified
 – Optional ATEX/IECEx (Europe)
– Enclosure Rating: IP66 (dust tight and water jet resistant)
– Ambient Temperature Range: -40°C to +82°C (dependent on seal material)
– Housing Material: Aluminum or epoxy-coated die-cast
– Cam & Lever Material: Stainless steel
– Seal Options: Buna-N (standard), Viton (optional)
– Approx. Dimensions: 6.5" H × 5" W × 4" D
– Weight: 2.8 to 3.2 kg (6.2 to 7 lbs) based on configuration

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