Crosby OMNI­TRIM Pressure Relief Valves

The Crosby OMNI-TRIM pressure relief valve is the proven solution for overpressure protection and/or thermal relief applications on air, gas, vapor, liquid, and steam. Its simple design makes it ideal for refineries, chemical and petrochemical plants, power plant auxiliary systems, and pulp and paper mills. Series 900 OMNI-TRIM pressure relief valves provide overpressure protection on air, gas, vapor, liquid thermal relief, and steam service with a maximum fixed blowdown of typically 20% or less. Standardization of components in the OMNI-TRIM provides easy assembly, durability, ease of maintenance, and lower inventory costs. The design and wide array of options provide maximum versatility and premium performance. Series BP OMNI-TRIM pressure relief valve is a piston, single trim designed valve for gas, vapor, and liquid applications involving variable back pressure with a full nozzle design and O-ring seat as standard.

Feature of Crosby OMNI­TRIM Pressure Relief Valves

• ASME/NB certified capacities for air, water and steam.
• Full compliance with all major global pressure relief st andards including ASME VIII, XIII, API 527, EN4126, PED/CE and numerous other standards.
• Series 900 uses single trim design for liquid, gas, and vapor services.
• Highly customizable to meet most applications.
• Interchangeable parts to reduce maintenance costs.
• Full nozzle configuration.
• Simple and reliable design.
• Easy maintenance.
• Soft seat options for superior seat tightness.
• Adjustable blowdown option to reduce product loss.
• BP balanced piston option to offset the effects of variable back pressure.

Technical Specification of Crosby OMNI­TRIM Pressure Relief Valves

• Sizes: ½” x 1” to 2” x 2” and 1½” x 2½” (DN 15 x 25 to 50 x 50 and 40 x 65)
• Orifices: 0.074 to 0.503 in² (47.7 to 325 mm²)
• Connections: NPT, flanged, male socket weld
• Temperature Range: -450 to +750°F (-268 to +399°C)
• Set Pressures: 5 to 5000 psig (0.34 to 345 barg)
• Steam Limit: 1000 psig (69 barg)
• Codes: ASME Section VIII and XIII (UV Designator) and ASME Section III (NV Designator)
• Back Pressure (Series BP): Maximum allowable back pressure in liquid applications is 70% of set pressure; in vapor and gas applications it is 50%; for liquid thermal relief applications 90% of set pressure. Maximum back pressure rating is 400 psig (27.58 barg)
• Blowdown: Maximum fixed blowdown is typically 20% or less for Series 900; Series BP blowdown is fixed and non-adjustable (typically 25% or less)
• O-Ring Soft Seat Materials (Series 900): NBR (-50 to +250°F), FKM (0 to +400°F), EPR (-50 to +250°F), FFKM (0 to +500°F), PTFE (-50 to +500°F), Silicone (-50 to +400°F); pressures 15-2500 psig
• O-Ring Soft Seat Materials (Series BP): NBR (-20 to +250°F), FKM (0 to +400°F), EPR (-20 to +250°F), FFKM (0 to +400°F), PTFE (-20 to +400°F), Silicone (-20 to +400°F); pressures 50-1500 psig