Product Overview

The FISHER 64 Series is a compact spring-loaded regulator widely used to supply reduced air or gas to pilot-operated controllers, positioners and rotary actuators. Bulletin 71.1:64 lists a 1/2 in NPT inlet, 1/4 in NPT gauge outlet and six interchangeable springs.

Key Features

• Die-cast aluminum body and spring case, 1.01 kg, UL listed

• Maximum inlet pressure 250 psig / 17.2 bar, outlet up to 150 psig / 10.3 bar

• Six spring ranges from 3 to 150 psig, all adjustable down to 0 psig

• 1/4 in NPT side outlet for pressure gauge or relief valve

• Nitrile or FKM diaphragm, PTFE protector option for ammonia service

Typical Applications

Supply pressure for valve actuators and positioners, instrument air reduction in control rooms, small burner and pilot gas trains, and anhydrous ammonia service with the PTFE diaphragm protector.

Selection Guide

Size the port on flow rather than line size: the 1/4 in port passes about 35.6 Cg wide open. Pick the lowest spring range that reaches the setpoint, and specify Type 64R where limited downstream relief capacity is needed.