Peter Skop Industries

Compressed Gas Division

Sherwood SHERcheck^®  TV Series Residual Pressure Back Check Valves

As a Stocking Distributor, PSI can quickly ship a large selection of Sherwood Compressed Gas  Products from our inventory. 

SHERCheck®TV Series Residual Pressure Back

Check Valves

· Retentive pressure of <30 psig maintains integrity of empty cylinder against aspiration of contaminants caused by open valve

· Integral back check mechanism helps prevent backflow if system pressure becomes higher than cylinder pressure

· Residual pressure/back check piston made of strong stainless steel for extended service life

· Strong, durable forged brass body manufactured by Sherwood to specifications stricter than most commercial forging specifications

· High-temperature aluminum alloy handwheel with large drainage holes

· Integral stainless steel tang helps prevent internal stem breakage

· Durable lower plug made of tough naval brass resists wear

· Lower plug is Teflon®-coated to add lubricity, which minimizes seizing and galling especially under high pressure operation

· Internally threaded chamber design promotes longer life and helps protect valve body chamber threads from damage

· Nickel 201 rupture disc resists premature rupture that may be caused by corrosive ambient environments

· Precise, quality machining results in exceptional finishes for low torque sealing and long packing life

· Inert Teflon packing provides leak-free stem seal, long cycle life and resistance to corrosion

· Handwheel nut coated with corrosion-resistant chromate/zinc organic plating

• XX - Denotes Pressure Relief Device burst disc rupture pressure.

• For technical information see Technical Section

• Available on request:

- 4 and 7 threads oversize inlets: To order, add -4 or -7 to end of part number.

ex: TV34661PR-XX becomes TV34661PR-XX-7.

- Chrome plating: To order, add letter “A” after letters “TV” in part number.

ex: TV34661PR-XX becomes TVA 34661PR-XX

- Anti-Surge Feature: To order, add letter “N” after part number.

ex: TV34661PR-XX becomes TV34661PR-XXN

- Fusible backed pressure relief devices in 165° F or 212° F nominal melting temperatures:

To order, change the “1” in the part number to “4” for 165° or to “5” for 212° .

ex: TV34661PR-XX becomes TV34664PR-XX for 165° or TV34665PR-XX for 212° .

- Rubber covered handwheel: To order, add letters “HC” after part number.

ex: TV34661PR-XX becomes TV34661PR-XXHC.

Filling Adapter Part Numbers                        With Retractable Pin                           Without Retractable Pin

             For CGA346 outlet order                                     P/N TL346AA                               TL346D

             For CGA350 outlet order                                     P/N TL350AA                               TL350D

             For CGA540 outlet order                                     P/N TL540AA                              TL540D

             For CGA580 outlet order                                     P/N TL580AA                               TL580D

For other CGA Outlets please contact the factory for ordering information.