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cashco HP Installation, Operation & Maintenance Manual

Pressure reducing regulator
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ISO Registered Company
I.
DESCRIPTION AND SCOPE
The Model HP is a heavy duty, high pressure reducing regulator used to control downstream (outlet or P
Sizes are 1/2", 3/4", 1" and 1-1/2" (DN15, 20, 25 and 40). With proper trim utilization, the unit is suit able for liquid and
gaseous service. Refer to Technical Bulletin HP-TB for design conditions and selection rec om men da tions.
STEAM SERVICE.
II. INSTALLATION
Installation of adequate overpressure pro tec tion
is recommended to pro tect the reg u la tor from
overpressure and all down stream equip ment from
damage in the event of regulator failure.
For welded installations, all internal trim parts, seals
and diaphragm(s) must be removed from reg u la tor
body prior to welding into pipeline. The heat of
fusion welding will dam age non-metallic parts if
not re moved. NOTE: This does not apply to units
equipped with extended pipe nip ples.
1.
An inlet block valve should always be installed.
2.
If service application is continuous such that shut down
is not readily accomplished, it is rec ommended that
an inlet block valve, outlet block valve, and a manual
bypass valve be installed.
3.
Pipe unions should be installed to allow removal from
piping.
4.
An outlet pressure gauge should be located
ap proxi mately ten pipe diameters downstream, and
within sight.
5.
All installations should include a downstream re lief
de vice if the inlet pressure could exceed the pres sure
rating of any downstream equip ment or the maximum
outlet pressure rating of the unit.
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
MODEL HP
PRESSURE RE DUC ING REGULATOR
CAUTION
CAUTION
SECTION I
SECTION II
6.
Clean the pip ing of all foreign material including chips,
welding scale, oil, grease and dirt before installing the
regulator. Strainers are rec om mend ed.
7.
In plac ing thread seal ant on pipe ends pri or to
en gage ment, ensure that excess material is re moved
and not allowed to enter the regulator upon startup.
8.
Flow Direction: Install so the flow direction match es
the arrow cast on the main regulator body.
9.
Basic Regulator - (Refer to Figure 1): Regulator may
be rotated around the pipe axis 360°. Rec om mend ed
position is with spring chamber ver ti cal upwards. Orient
such that the spring chamber vent hole does not collect
rainwater or debris.
10. Regulators are not to be direct buried un der ground.
11. For insulated piping systems, recommendation is to not
insulate regulator.
IOM-HP
12-16
) pres sure.
2
NOT FOR

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Summary of Contents for cashco HP

  • Page 1 SECTION I DESCRIPTION AND SCOPE The Model HP is a heavy duty, high pressure reducing regulator used to control downstream (outlet or P ) pres sure. Sizes are 1/2", 3/4", 1" and 1-1/2" (DN15, 20, 25 and 40). With proper trim utilization, the unit is suit able for liquid and gaseous service.

  • Page 2: Principle Of Operation

    Refer to HP-TB, Table diaphragm pushes up and the port opening closes. 5, for “emergency over-pressure level”. NOTE:...

  • Page 3: Maintenance

    “oxygen clean”, could result in personal injury. Option-55, main te nance must include a level of clean li ness equal to Cashco's clean ing stan dard A. General: #S-1134. Con tact factory for details.
  • Page 4 "oxygen clean", CAUTION Options-55, maintenance must in clude a lev el of clean li ness equal to Cashco's clean ing stan dard When pis ton (15) assemblies are used with #S-1134. Contact factory for details.

  • Page 5: Troubleshooting Guide

    No pressure relief protection. Install safety relief valve, or rupture disc. Restricted diaphragm movement. Ensure no moisture in spring chamber at temperatures below freeze point. Ensure no dust or debris entering vent opening. If rainwater or debris can enter, re-orient regulator. IOM-HP...

  • Page 6: Section Viii

    Cashco, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Cashco, Inc. product remains solely with the purchaser.
  • Page 7 Body Cap O-Ring Quad Ring Backup Ring Items Not Shown Diaphragm Gasket used only with metal diaphragm(s) Diaphragm Ring (1-1⁄2" size only) Closing Cap Closing Cap Gasket FIGURE 1 Model HP – Metal Seat FIGURE 2 Balanced Composition Seat IOM-HP...
  • Page 8 ATEX requires that all components and equipment be evaluated. Cashco pressure regulators are considered components. Based on the ATEX Directive, Cashco considers the location where the pressure regulators are installed to be classified Equipment-group II, Category 3 because flammable gases would only be present for a short period of time in the event of a leak.
  • Page 9 If the above issues are addressed by selecting options that do not have potential sources of ignition, avoiding options that have not been assessed, and by taking the proper usage issue precautions, then Cashco regulators can be considered to be a mechanical device that does not have its own source of ignition and thus falls outside the scope of the ATEX directive.

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