MDC Vacuum Products Corp.- Angle and Inline Valves

Angle & Inline Valves
Introduction

Vacuum angle and inline valves are devices that regulate the flow of gases, fluids or materials through a structure or aperture by opening, closing or obstructing a port or passageway.

Angle valve assemblies consist of an

Actuator
Poppet
Valve Body

The actuator provides the power to position or transport the valve’s poppet which is attached to the valve’s body via a circular bonnet flange.

The poppet closes or opens one of the valve’s body ports.

The valve body is a vacuum tight chamber that is screwed, flanged or welded into a larger vacuum vessel or system.

Reliable vacuum valves were not commercially available until the late 1940s with the advent of O-ring elastomer seals. The elastomer O-ring was developed during WWII for use in aircraft hydraulic systems, and was soon thereafter adopted by the vacuum community as the standard means of making vacuum seals. Prior to this it was common practice, even in large research establishments, to upgrade general service valves for vacuum use by winding actuator shaft gaskets from string soaked in an Apiezon grease.

MDC stainless steel vacuum angle and inline valves have been designed for maximum conductance and minimum size for easy installation. These valves are ideally suited for systems requiring high reliability and low outgassing. The valves’ low outgassing characteristics can be attributed to a fusion welded 304 stainless steel body, welded AM-350 stainless steel nesting bellows as well as small crosssection elastomers and the elimination of blind internal cavities.

MDC angle and inline valves are offered in various sizes ranging from .25" to 10" port diameters. Standard port mounts include:

Del-Seal™ CF metal seal flanges, recommended for ultrahigh vacuum service
ISO Kwik-Flange™ and ISO Large-Flange™ fast-make and fast-break elastomer seal flanges, ideal for high vacuum applications requiring frequent assembly and disassembly.

All dimensions in this catalog are given in
inches unless specified otherwise.

Standard Features

UHV and HV series
Del-Seal™ CF, ISO KF Kwik-Flange™, ISO LF Large-Flange™ and Tube-Weld port connections.
Manual and Electropneumatic actuators
120VAC air control solenoid valve
OFE copper metal and Viton® elastomer bonnet seals
Welded bellows actuator seal
TIG welded internal body joints
Electropolished interior and exterior surfaces

Optional Features