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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 formore
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Item #

Tubing O.D.

Connection

Pressure

Orifice

Rated Cv

A

B

C

D Hex

Body Hex

Repair Kits

N/A 1/4 N/A 1/4 MPI™ N/A 15000 psi1035 bar N/A .125 in N/A .28 N/A 3.80 in N/A 2.63 in N/A .50 in N/A 13/16 in N/A 13/16 in N/A R4MAC
N/A 3/8 N/A 3/8 MPI™ N/A 15000 psi1035 bar N/A .219 in N/A .84 N/A 4.40 in N/A 3.06 in N/A .63 in N/A 15/16 in N/A 1 in N/A R6MAC
N/A 1/2 N/A 1/2 MPI™ N/A 15000 psi1035 bar N/A .359 in N/A 2.30 N/A 5.56 in N/A 3.94 in N/A .69 in N/A 1 3/16 in N/A 1 3/8 in N/A R8MAC
N/A 9/16 N/A 9/16 MPI™ N/A 15000 psi1035 bar N/A .359 in N/A 2.30 N/A 5.56 in N/A 3.94 in N/A .75 in N/A 1 3/16 in N/A 1 3/8 in N/A R9MAC
N/A 3/4 N/A 3/4 MPI™ N/A 15000 psi1035 bar N/A .516 in N/A 4.70 N/A 7.05 in N/A 5.13 in N/A .88 in N/A 1 3/8 in N/A 1 3/4 in N/A R12MAC
N/A 1 N/A 1 MPI™ N/A 15000 psi1035 bar N/A .688 in N/A 7.40 N/A 8.71 in N/A 6.25 in N/A 1.13 in N/A 1 7/8 in N/A 2 1/8 in N/A R16MAC
N/A 1/4 N/A 1/4 MPI™ N/A 15000 psi1035 bar N/A .125 in N/A .28 N/A 3.80 in N/A 2.63 in N/A .50 in N/A 13/16 in N/A 13/16 in N/A R4MACB
N/A 3/8 N/A 3/8 MPI™ N/A 15000 psi1035 bar N/A .219 in N/A .84 N/A 4.40 in N/A 3.06 in N/A .63 in N/A 15/16 in N/A 1 in N/A R6MACB
N/A 1/2 N/A 1/2 MPI™ N/A 15000 psi1035 bar N/A .359 in N/A 2.30 N/A 5.56 in N/A 3.94 in N/A .69 in N/A 1 3/16 in N/A 1 3/8 in N/A R8MACB
N/A 9/16 N/A 9/16 MPI™ N/A 15000 psi1035 bar N/A .359 in N/A 2.30 N/A 5.56 in N/A 3.94 in N/A .75 in N/A 1 3/16 in N/A 1 3/8 in N/A R9MACB
N/A 3/4 N/A 3/4 MPI™ N/A 15000 psi1035 bar N/A .516 in N/A 4.70 N/A 7.05 in N/A 5.13 in N/A .88 in N/A 1 3/8 in N/A 1 3/4 in N/A R12MACB
N/A 1 N/A 1 MPI™ N/A 15000 psi1035 bar N/A .688 in N/A 7.40 N/A 8.71 in N/A 6.25 in N/A 1.13 in N/A 1 7/8 in N/A 2 1/8 in N/A R16MACB
N/A 1/4 N/A 1/4 MPI™ N/A 15000 psi1035 bar N/A .125 in N/A .28 N/A 3.80 in N/A 2.63 in N/A .50 in N/A 13/16 in N/A 13/16 in N/A R4MAC-2507
N/A 3/8 N/A 3/8 MPI™ N/A 15000 psi1035 bar N/A .219 in N/A .84 N/A 4.40 in N/A 3.06 in N/A .63 in N/A 15/16 in N/A 1 in N/A R6MAC-2507
N/A 1/2 N/A 1/2 MPI™ N/A 15000 psi1035 bar N/A .359 in N/A 2.30 N/A 5.56 in N/A 3.94 in N/A .69 in N/A 1 3/16 in N/A 1 3/8 in N/A R8MAC-2507
N/A 9/16 N/A 9/16 MPI™ N/A 15000 psi1035 bar N/A .359 in N/A 2.30 N/A 5.56 in N/A 3.94 in N/A .75 in N/A 1 3/16 in N/A 1 3/8 in N/A R9MAC-2507
N/A 3/4 N/A 3/4 MPI™ N/A 15000 psi1035 bar N/A .516 in N/A 4.70 N/A 7.05 in N/A 5.13 in N/A .88 in N/A 1 3/8 in N/A 1 3/4 in N/A R12MAC-2507
N/A 1 N/A 1 MPI™ N/A 15000 psi1035 bar N/A .688 in N/A 7.40 N/A 8.71 in N/A 6.25 in N/A 1.13 in N/A 1 7/8 in N/A 2 1/8 in N/A R16MAC-2507
N/A 1/4 N/A 1/4 MPI™ N/A 15000 psi1035 bar N/A .125 in N/A .28 N/A 3.80 in N/A 2.63 in N/A .50 in N/A 13/16 in N/A 13/16 in N/A R4MACB-2507
N/A 3/8 N/A 3/8 MPI™ N/A 15000 psi1035 bar N/A .219 in N/A .84 N/A 4.40 in N/A 3.06 in N/A .63 in N/A 15/16 in N/A 1 in N/A R6MACB-2507
N/A 1/2 N/A 1/2 MPI™ N/A 15000 psi1035 bar N/A .359 in N/A 2.30 N/A 5.56 in N/A 3.94 in N/A .69 in N/A 1 3/16 in N/A 1 3/8 in N/A R8MACB-2507
N/A 9/16 N/A 9/16 MPI™ N/A 15000 psi1035 bar N/A .359 in N/A 2.30 N/A 5.56 in N/A 3.94 in N/A .75 in N/A 1 3/16 in N/A 1 3/8 in N/A R9MACB-2507
N/A 3/4 N/A 3/4 MPI™ N/A 15000 psi1035 bar N/A .516 in N/A 4.70 N/A 7.05 in N/A 5.13 in N/A .88 in N/A 1 3/8 in N/A 1 3/4 in N/A R12MACB-2507
N/A 1 N/A 1 MPI™ N/A 15000 psi1035 bar N/A .688 in N/A 7.40 N/A 8.71 in N/A 6.25 in N/A 1.13 in N/A 1 7/8 in N/A 2 1/8 in N/A R16MACB-2507
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