H200 Series Relief Valves Figure 1. External View of H200 Series Relief Valve Figure 2. Sectional View of H200 Series Relief Valve The H200 Series Pop™ relief valves, Figures 1 and 2, are self-operated relief valves with preset and pinned spring retainers. The inlet pressure registers directly on a spring-opposed poppet assembly which includes a Nitrile (NBR) disk. When the inlet gas pressure increases above the spring setting, the poppet and disk assembly is pushed away from the orifice. Springs are available that provide any relief pressure setting from 25 to 300 psig / 1.7 to 20.7 bar.   •  Space-Saving Construction - Small relief valve size allows installation where space is limited. With this simple operation and wide spring setting selection, the H200 Series Pop relief valves may be used where venting to atmosphere is acceptable, where the process gas is compatible with the Nitrile (NBR) disk, where its relief capacity is adequate and where some pressure relieving tolerance is acceptable. Common applications include use on pneumatic control lines of air drills, jackhammers and other similar equipment and on farm tap installations. The H200 Series is comprised of the Types H202 and H203 relief valves with the difference being in the inlet connection size.  •  conomical - Low initial cost, easy installation E and high capacity per dollar invested reduces total cost of having relief valve capabilities in your system.  •  urable - Brass body construction and stainless D steel spring reduces susceptibility to corrosion damage and the preset, pinned spring retainer prevents relief valve setpoint tampering. Installation This relief valve may be installed in any position but must be oriented so that gas discharged from the valve does not create a fire, toxic or explosion hazard. The relief valve should be protected from material and conditions that could clog the outlet side of the valve and affect the venting of gas. A typical installation is shown in Figure 3. A Type P145 raincap is recommended for use with any H200 Series relief valve. Dimensions are shown in Figure 4. The relief valve and installation should be checked for compliance with all

H200 Series Specifications This section lists the specifications for H200 Series external relief valves. Factory specifications are engraved on the body of the relief valve at the factory. Available Configurations and End Connections Type H202: 3/4 NPT connection Type H203: 1 NPT connection Construction Materials Body, Poppet and Spring Retainer: Brass Disk: Nitrile (NBR) Spring: 302 Stainless steel Maximum Allowable Relief (Inlet) Pressure(1) 400 psig / 27.6 bar Relief Pressure Ranges(1) See Tables 1 and 2 Flow Capacity See Table 2 Option Type P145 raincap Representative Wide-Open Sizing Coefficient...

H200 Series TYPE P145 RAIN CAP H200 SERIES RELIEF VALVE LOW-PRESSURE REDUCING REGULATOR HIGHPRESSURE REDUCING REGULATOR INLET PRESSURE Figure 3. Typical Farm Tap Installation

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