PMV(Pressure Maintain Valve or Back Pressure Valve)

출처 : http://www.bauer-kompressoren.de/fileadmin/documents/products/spare-part-list/junior/2013-10-01/JUN2-1013EN.pdf

출처 : http://www.scubaengineer.com/high_pressure_compressor_filtrat.htm

1/4″ NPT 6000 PSI Back Pressure Regulator (Pressure Maintaining Valve)

Known as a priority valve or pressure maintaining valve. A fully balanced, economical regulator. It serves a wide variety of uses, however it’s main use is on small compressors. The regulator will improve moisture separator efficiency and filter life as much as 450%. This is done by maintaining pressure in the separator and filter at 1800 PSI or more when tank pressure is lower. It has two outlet ports permitting attachment of a filling yoke and gauge directly to the regulator. This eliminates costly fittings.

Specifications

• Maximum rated pressure – 6000 PSI (40MPa)
• Set Pressure – 1800 PSI (adjustable 300 to 5000)
• Materials – Anodized body, brass, stainless steel, viton seals
• Flow Capacity – 2 to 50 SCFM internal
• Leakage – Zero external; 0.05 SCFM internal
• Ports – 1/4″ female pipe thread (NPT)
• Size – 3 1/2″ x 1 1/2″ x 1″

Typical Applications

• Separator and Filter Systems
• Compressors
• Control Systems
• Cascading Systems

제품 설명 출처 : https://nuvair.com/1-4-npt-6000-psi-back-pressure-regulator-pressure-maintaining-valve.html

※  Regulator Operation & Maintenance

※  Back Pressure Regulator Technical Bulletin

※  Application Note: Use of Sequence Valve 1018 to Priority Fill from Cascade Banks

참고
– http://www.scubaengineer.com/high_pressure_compressor_filtrat.htm
– http://thedecostop.com/forums/showthread.php?10085-Understanding-SCUBA-Compressors-and-Filtration