This Edwards CTI-Cryogenics Roughing Valve, with CF 1.33 inlet and outlet, connects to a system rough pump or dry pump. The rough valve is used during the Cryopump regeneration cycle to rough the Cryopump to rough vacuum (approximately 50-100 microns) before the Cryopump begins to cool down.

This kit includes the valve, 3 pin receptacle, female crimp socket, copper gasket socket head cap screws and instructions.

You can control the roughing valve by the CTI-Cryogenics REGEN, or use it separately.

The roughing valve is pneumatically operated by an electrically operated solenoid valve which supplies air pressure to open and close the roughing valve. The roughing valve is normally closed. Applying 115 VAC to the solenoid causes the valve to open. Loss of power, or loss of air pressure causes the roughing valve to close (spring return). Under normal operating conditions, when the valve is closed, it is closed by both the return spring and the airline pressure. The valve is an air-to-open, and air-assisted-to-close design.

The solenoid is rated at 115 +/- 15 VAX, 50/60 Hz, 6 Watts. Operating air pressure is 75-100 psig.