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r <br /> B. Bronze Safety Valves: cast bronze body,Class 250,with threaded(MPT) inlet and threaded(FPT)outlet; forged <br /> copper alloy disc,fully enclosed cadmium plated steel spring having an adjustable pressure range and positive shut- <br /> off. Factory-set valves to relieve at 10 psi above operating pressure. <br /> C. Cast-Iron Safety Valves: cast iron body and bronze seat, Class 250; forged copper alloy disc and nozzle; fully <br /> enclosed stainless steel spring having an adjustable pressure range and positive shut-off; threaded end connections <br /> for valves 2 inch and smaller, raised face flanged inlet and threaded outlet connections for valves 2-1/2 inch and <br /> larger. Factory-set valves to relieve at 10 psi above operating pressure. <br /> 2.07 PRESSURE REGULATING VALVES <br /> A. General: Select pressure reducing valves of size, capacity, and pressure rating as scheduled. Factory-set for inlet <br /> and outlet pressures as indicated. <br /> B. Valves Characteristics: Pilot-actuated, diaphragm type, with adjustable pressure range and positive shut-off; cast <br /> iron body with flanged end connections,hardened stainless steel trim,and replaceable valve head and seat. Provide <br /> main head stem guide fitted with flushing and pressure arresting device. Provide cover over pilot diaphragm for <br /> protection against dirt accumulation. <br /> 2.08 STEAM TRAPS <br /> A. Thermostatic Traps: cast brass, angle pattern body, with integral union tailpiece and screw-in cap; maximum <br /> operating pressure of 25 psig; balanced pressure stainless steel or monel diaphragm or bellows element, with <br /> renewable hardened stainless steel valve head and seat. <br /> tB. Float and Thermostatic Traps: ASTM A 278, Class 30 cast iron body and bolted cap; renewable, stainless steel <br /> float mechanism, with renewable, hardened stainless steel head and seat; balanced pressure thermostatic air vent <br /> made of stainless steel or morsel bellows with stainless steel head and seat. <br /> rC. Inverted Bucket Traps: ASTM A 278, Class 30 cast iron body and cap,pressure rated for 250 psi; stainless steel <br /> head and seat;stainless steel valve retainer,lever,guide pin assembly,brass or stainless steel bucket. <br /> 1. Integral stainless steel inlet strainer within trap body. <br /> 2.09 AIR VENTS <br /> A. Quick Vents: cast iron or brass body, with balanced pressure stainless steel or monel thermostatic bellows, and <br /> stainless steel heads and seats. <br /> B. Float Vents: cast iron or brass body; seamless brass float; balance pressure thermostatic bellows; replaceable <br /> stainless steel seat,float,and head. <br /> 2.10 STRAINERS <br /> A. Y-Pattem Strainers: minimum 250 psig steam working pressure;cast iron body conforming to ASTM A 278,Class <br /> 30;threaded connections for 2 inch and smaller,flanged connections for 2-1/2 inch and larger;grade 18-8 stainless <br /> steel screen(20 mesh for 2 inch and smaller,and manufacturer recommended perforations for sizes 2-1/2 inch and <br /> larger);tapped blow-off plug. <br /> B. Basket Strainers: minimum 250 psig steam working pressure; cast iron body conforming to ASTM A 278, Class <br /> 30;flanged connections;grade 18-8 stainless steel screen;bolted cover. <br /> r <br /> 15520-5 No.99132-CP2 <br />