Air Compressor Minimum Pressure Check Valves

Minimum Pressure Check Valve Operation

1. At start-up, the valve stays closed up to a preset level and then opens to maintain a minimum pressure in the air-oil separator. This assures pressure for lubricating the compressor, reduces oil foaming and protects the air-oil separator element.
2. At shut-down, the check valve closes to prevent back flow through the compressor.

Minimum Pressure Check Valve Features

• Flow passages designed for low pressure drop
• TFE seats for tight seal
• Viton* O-rings for lubricant compatibility
• Cast iron housings
• Maximum pressure: 160 PSI (350 PSI maximum pressure version available)
• Flow: 1,500 SCFM maximum
• Inlet and outlet side ports for pressure taps

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