Dwyer's WE31 is designed for minimal pressure drop
Dwyer's Series WE31 is designed to incorporate a 3-way NPT stainless steel ball valve made for great flow rates with minimal pressure drop. The valve is built to feature a blowout proof stem for added safety, reinforced PTFE seats and seals for longer life, and a 316SS (ASTM CF8M) ball. Actuators are constructed to be direct mounted creating a compact assembly for tight spaces. Limit switches are made to be mounted directly to the valves allowing for remote position indication.
The Series WE31 is designed to be configured with either an electric or pneumatic actuator. Electric actuators are made in weatherproof or explosion-proof, a variety of supply voltages and two-position modulating control. Two-position actuators are constructed to use the supply voltage to drive the valve open or closed, while the modulating actuator is built to accept a 4 to 20mA input for valve positioning. Actuators are constructed to feature thermal overload protection and permanently lubricated gear train. The pneumatic double acting actuator is designed to use an air supply to drive the valve open and closed. The actuator is built to have two supply ports, with one driving the valve open and the other driving the valve closed. Spring return pneumatic actuators are constructed to use the air supply to open the valve and internally loaded springs return the valve to the closed position. Also available is the SN solenoid valve, which is made to electrically switch the air supply pressure between the air supply ports for opening and closing the valve.