Parker’s MACB series (Ball Check Valve) prevent reverse flow where leak-tight shut-off is not mandatory. When differential drops below cracking pressure, valve closes. With all-metal components, valve can be used up to 1000°F (538°C). Ball and poppet are an integral design to assure positive, in-line seating without “chatter”. Poppet is designed essentially for axial flow with minimum pressure drop.

Parker’s MAC series (O-Ring Check Valve) provides unidirectional flow and tight shut-off for liquids and gases with high reliability. When differential drops below cracking pressure*, valve shuts off. (Not for use as a Relief Valve).
*Cracking pressure: 20 psi (1.4 bar) +/-30%. For higher cracking pressures (up to 100 psi (6.7 bar) available with special order for O-ring style check valves only.

NOTE:

Minimum operating temperature for standard BALL check valves -110°F (-79°C). For low temperature option to -423°F (-252°C) add suffix-LT (Low temperature spring).

Temperature range for standard Fluorocarbon Rubber O-RING check valves is 0°F to 400°F (-18°C to 204°C). For temperatures under 0°F to -423°F use PTFE o-ring (-TO). If under -110°F (-79°C) Low Temperature Spring must be used (-LT option).

For 2507 Super Duplex option, replace -SS with -2507. For 2507 Repair kits, include -2507 as suffix.

-XF Ferrules are required for 3/4" and 1" 316 SS or 2507 Super Duplex Tubing.

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