CONRADER RCB-HU 160-175 Unloader Pilot Valve 160-175 Psi

Conrader RCB-HU 160-175 unloader pilot valve uses a pneumatic (air) signal to actuate another connected device like a throttle control that slows down and speeds up an engine in compressed air systems. It can also be used to open / close a discharge valve for venting air into the atmosphere or operate intake unloaders in the connected compressor's head. This unloader pilot valve is ideal for regulating the device output by actuating the unloader mechanism of the intake valve or the discharge mechanism of the compressor when there is a greater compressed air supply than the demand.

Working Mechanism:

• When pressure increases in a system and reaches the unload condition, the pilot valve opens up and actuates another device by pressurising the line downstream.
• When the pressure in the system decreases till the load pressure is achieved, the pilot valve closes and returns the device to normal operation by depressurising the line downstream.

Features:

• Conrader RCB-HU 160-175 unloader pilot valve has a brass body with stainless steel pilot valve ball for corrosion resistance.
• The maximum setting of this valve refers to the unload pressure (cut-out), whereas the minimum setting denotes the load pressure (cut-in).
• It has two adjustment screws & two lock nuts to set the load and unload pressure.
• This pilot valve has an adjustable pressure range from 160 to 175 psi.
• It comes with a replaceable inlet filter, preventing the entry of contaminants into the connected devices.
• This valve operates at temperatures ranging from -15 to 400 degrees F.
• It has a 1/4 inch FNPT inlet and a 1/8 inch FNPT outlet.

Compatible Accessories:

• Dual Control Lockouts: The manual hand unloader lever of this unloader pilot valve can be replaced with these dual control lockouts for switching between start / stop and continuous operation on electric motor compressors.

Frequently Asked Questions:

Q. What are the different uses of this Conrader RCB-HU 160-175 unloader pilot valve?

A.

• Throttle controls for controlling engine speed.
• Unloader valves to regulate a compressor.
• Drain valves for removing condensate from systems.
• Normally open / close valves.
• Shuttle valves.

Q. What are the different settings available in this Conrader RCB-HU 160-175 unloader pilot valve?

A.

• The unload set pressure refers to the point at which the valve operates the intake unloaders or discharge mechanism for venting the compressor delivery into the atmosphere.
• The load set pressure refers to the point at which the unloader pilot valve actuates the compressor to restart producing compressed air.
• The differential refers to the pressure range between the load & unload pressures.

Q. How to adjust this Conrader RCB-HU 160-175 unloader pilot valve?

A.

• Differential adjustment screw & locknut is below the pressure adjustment screw & locknut. Users should remember their location before adjustment.
• Drain the system air from the system and inspect the safety device. Loosen both the differential & pressure adjustment locknuts fully and then gently turn the differential screw in a clockwise direction till it stops.
• Remove the pressure adjustment screw from the valve body and then reinstall it by turning it two full turns.
• Restart the compressor and then increase the pressure to reach the desired load pressure. Turn off the compressor.
• Back off the differential screw by 1/3 of a counterclockwise turn to allow actuating of unloading devices as in normal operation. Tighten the differential locknut.
• After the desired load pressure is attained, turn the pressure adjustment screw slowly in the clockwise direction. As you are turning the valve, listen for the valve to load. It will exhaust air from the top of the valve body and make a hissing noise. Once air gets exhausted from the top of the valve body by making a hissing noise, tighten the pressure adjustment locknut.