The Delta-P Valve (DPV) is an important component of any rough or high vacuum system. The DPV provides anti-suckback and vacuum system isolation from the mechanical backing pump during a power outage. It prevents backstreaming and the migration of contaminants (e.g., rotary pump oil or scroll pump tip seal particles) into the vacuum system. It also protects a high vacuum pump from damage.

The Delta-P Valve operates on the Differential (Delta) Pressure (P) between ambient atmosphere and the roughing/backing pump’s vacuum level. During a power failure, the mechanical pump is vented to atmosphere from its inlet flange which pushes debris towards the mechanical pump. This stops undesirable material from being swept into the system when the pump restarts.

The DPV is a compact, inline unit which mounts directly on the inlet flange of the mechanical pump. It is available with either KF-16, KF-25, KF-40, or KF-50 vacuum flanges, and solenoid voltages of 120 VAC, 220 VAC or 24 VDC. The DPV can be supplied in a custom configuration with different flanges on either end for no additional cost (please inquire).

DPV closure speed is approximately 25 ms, faster than other isolation valves. This is due to the reduced moving mass of our advanced piston design. Flow is unrestricted with flange sizes smaller than KF-50. A slight reduction in conductance may be experienced with pumps that have a high pumping speed and KF-50 inlet flange. The DPV can be mounted in any orientation; vertical, horizontal, or inverted.

All parts that make up the DPV have been carefully selected for vacuum system compatibility and longevity. To ensure the Delta-P Valve you receive is of the highest quality, all production and assembly is done in our own manufacturing facility in Albuquerque, NM, U.S.A. Furthermore, every Delta-P Valve is helium leak tested and must meet our stringent quality control standards before it leaves our facility. Upon delivery, your Delta-P Valve is ready for immediate installation into a new or existing system.

The Delta-P Valve is intended for use with clean, dry air or inert gases. For processes that use or create corrosive or toxic gasses, the valve’s solenoid breather vent must be replaced with an exhaust line that exits to the facility exhaust.