SH-Series traps utilize nickel-chrome bimetallic element that allows for tight shut off before super heat steam reaches the trap. In addition, the traps are engineered with a fail-open design safety feature. The SH-600 steam trap from Armstrong International Inc. will withstand pressures of 600 psig at 750oF (399oC). This model is available with 1/2 and 3/4" screwed NPTY, BSPT, socketweld or flanged connections. The model SH-900 is designed for a maximum pressure of 900 psig at 900oF (482oC) and is available with 1/2, 3/5 and 1" socketweld, buttweld or flanged connections.