Technical Parameters Category Parameter Specification / Description General Model 3661 Type Pneumatic Force-Balance Positioner (Double-Acting) Input & Output Input Signal 3 to 15 psi (0.2 to 1.0 bar) Supply Pressure Up to 100 psig (6.9 bar) Output Pressure Can approach supply pressure (e.g., up to 100 psig) on both outputs. Performance Linearity ±1% of span Hysteresis Less than 0.5% of span Air Consumption At Steady State: ~0.2 SCFM (5.7 NLPM) During Stroking: Higher, suitable for driving piston actuators. Output Capacity High, designed to fill and exhaust the volumes of typical piston actuators. Environmental Ambient Temperature -40°F to 175°F (-40°C to 80°C) Enclosure Rating Type 4X, 7, 9 (NEMA 4X, 7, 9); Weatherproof, dust-tight, and certified for hazardous locations. Hazardous Area Certifications FM/CSA: Explosion-proof (Class I, Div. 1, Groups B, C, D; Class II, Div. 1, Groups E, F, G). Physical Housing Material Aluminum with corrosion-resistant coating. Pneumatic Connections Supply & Outputs: 1/4" NPT Weight Approximately 15 lbs (6.8 kg)
