Gasboy Atlas Start-up - Manual (Page 192)

Page 6-72 MDE-4334D Atlas™ Start-up and Service Manual · July 2013
Hydraulic/Mechanical Components Valves
Figure 6-38: OPW Shear Valve for 9862KXTW1 DEF Unit
Note: Misaligned piping could result in a leak.
Washer-small Spring Snap Ring
1.1-inch BSPP
Body Washer-large
4.44
1.22
2.66
Guide
Stem
Viton Disc TFR-ISO Reference View
(i)
(ii)
Inspecting Shear Valves
Always confirm proper operation of the shear valve before performing the hydraulic service that
requires the shear valve to be closed. In some instances, a shear valve may outwardly appear
closed but could actually be open.
WARNING
To inspect a shear valve, proceed as follows:
1 Close the shear valve. Authorize the hose at the console, as required.
2 Lift the operating handle.
3 Place the discharge nozzle in an approved container.
4 Squeeze the nozzle operating lever. If the flow continues after several seconds, it indicates that
the valve is defective.
5 Repair or replace the valve.
6 Place a few drops of SAE 10 W motor oil or equivalent on the valve body shaft after testing.
Open and close the valve by hand several times. Place the valve back in service.
T-52A Pressure Regulator Valve Option
The Model T-52A PRV is a unique control valve developed for use with suction-type island
dispensers. It can be used for above ground storage tank installations or in booster systems,
with a submersible pump in an underground storage tank.
The standard Model T-52A PRV is designed for temperatures up to -13 ° F (-25 ° C). A T-52A
cold option is available for applications, where the valve must operate in temperatures
between -13
° F to 40 ° F (-25 ° C to -40 ° C). The T-52A-Cold Valve is not for use with

methanol/ethanol applications.