Installation and Orientation
and inline valves can be installed using one of five industry
standard port connections. Custom configurations are also available
upon request. Valves up to and including 4-inch ports can be
installed in either a vertical or horizontal orientation. Valves
with 6-inch and larger ports must be installed in a vertical
orientation, as shown in the figure below. The bottom port is
usually oriented towards the vacuum environment. Mounting in this
fashion minimizes the in-vacuum volume and also aids poppet sealing
when the side port is vented to air.
Angle and inline valves
can be sealed via manual or electropneumatic actuation. All valves
up to 3-inch ports will seal against 15 psi differential atmospheric
pressure in either a bottom or side port direction. Those with
4-inch and larger ports should be installed with vacuum at the valve
seat port only, shown as bottom port. Electropneumatic angle and
inline valves with ¼-inch to 1½-inch diameter ports are fitted
with air-open / spring-close actuators. Valves with 2-inch or larger
diameter ports employ air-open / air-close pneumatic actuators.
Custom actuator designs are available on request.
Bakeout- Air control solenoid valves
must be removed or remotely mounted for valve maximum bakeout
conditions. The solenoid valve temperature should not exceed 50°C.
Pneumatically actuated air cylinder seals are Viton® elastomer
O-rings and therefore have a temperature limit of 150°C.
Maintenance- Actuator and poppet
mechanism may be removed through the bonnet flange for seal
replacement, cleaning or retrofitting without removing the valve
body from the system. Refer to instruction manual for details.
Leak Testing- Each valve is tested
using a helium mass spectrometer leak detector calibrated for a
minimum sensitivity of 2x10-10 std. cc/sec of Helium. Internal welds
are inspected for pits, cracks, and other irregularities which may
cause virtual leaks.
| Inline Valves
|For product listing, features
and specifications click on links below
| 3/4 inch ports
| 1 inch ports
| 1-1/2 inch ports
| 2 inch ports
| 2-1/2 inch ports
| 3 inch ports