Basic Info.

Product Description

Body sizes and end connection styles type 289a: 1/4 fnpt type 289h: 1, 2 fnpt type 289hh: 1 fnpt type 289l: 3/4, 1 fnpt maximum allowable relief (inlet) pressure 100 psig / 6,9 bar relief set pressure ranges type 289a - zinc: 3 to 13 psi / 0,21 to 0,90 bar 11 to 22 psi / 0,76 to 1,5 bar type 289h - cast iron: 7 to 18-inches w.c. / 17 to 45 mbar 0.5 to 2.25 psi / 0,03 to 0,15 bar 1.75 to 7 psi / 0,12 to 0,48 bar 4 to 10 psi / 0,28 to 0,69 bar type 289h - aluminum: 1 to 4.5 psi / 0,07 to 0,31 bar 4 to 15 psi / 0,28 to 1,0 bar 10 to 20 psi / 0,69 to 1,4 bar 15 to 50 psi / 1,0 to 3,5 bar type 289hh - aluminum: 45 to 75 psi / 3,1 to 5,2 bar type 289l - aluminum: 12 to 40-inches w.c. / 30 to 99 mbar 10 to 18-inches w.c. / 25 to 45 mbar pressure registration internal temperature capabilities nitrile (nbr) and neoprene (cr) elastomers: -20° to 150°f / -29° to 66°c fluorocarbon (fkm): 20° to 300°f / -7° to 149°c available with types 289h and 289hh only approximate weights type 289a and 289u: 0.75 pounds / 0,3 kg type 289h: 1 npt - 4 pounds / 2 kg, 2 npt - 15 pounds / 7 kg type 289hh: 4 pounds / 2 kg type 289l: 15 pounds / 7 kg