2010B. Available Materials Aluminum Carbon Steel Stainless Steel Ductile Iron Special Materials on Application

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1 OVER EQUIPMENT VRE 0 / 00 Series PRESSURE N VUUM RELIEF VLVE The 0/00 protects tanks from damage or deformation, and minimizes emissions to the environment, as well as loss of product due to evaporation. Introduction The Varec 0 and 00 Pressure and Vacuum Relief Valves are designed for use on atmospheric and low pressure storage tanks. The 0 vents to atmosphere. The 00 allows vapors to be piped away for recovery or destruction. The primary function of both models is to protect the tank from physical damage or permanent deformation caused by increases in internal pressure or vacuum encountered in normal operations. On smaller tanks, the valve may also provide sufficient flow capacity for emergency venting. The air-cushion seating design keeps the valve tightly sealed until the pressure inside the tank approaches the valve setting. Valve selection should be in accordance with merican Petroleum Institute Standard 000 or other applicable standard. Flow curves are provided to help you select the proper valve size for your venting requirements. dditionally, Varec s applications engineering staff and factory trained representatives are always available to assist you. y controlling tank venting, the 0 and 00 not only minimize emissions to the environment, but also minimize the loss of product to evaporation. When combined with a well-designed vapor recovery system, the loss can be cut to essentially zero. n ll-weather option is offered for freezing climates. The design features a special non-frosting and icing-resistant coating on the pallet perimeter, stem, guide posts and tip-of-seat ring. The coating, along with the flexible seat insert, provides additional protection against pallets freezing closed. 0 vailable Materials arbon Steel Stainless Steel uctile Iron Special Materials on pplication For high temperature and chemical applications, Varec recommends one of the extended service options, which offers the selection of O-ring, gasket, and screen material. Models 0 and 00 are part of VRE modular products which use interchangeable components for assembling a variety of functional configurations. The modular design provides flexibility of field installation and allows the valve to be reconfigured, repaired and even upgraded on-site by simply replacing or adding components. Features 00 The pressure and vacuum ports are oversized to provide maximum flow capacity. The hood and cover are easily removed for inspection and maintenance. The seat rings are both interchangeable and field replaceable. Protective screens are provided at pressure and vacuum ports to prevent entrance of foreign matter. The outlet adapter on the 00 Series is one pipe size larger than the valve inlet flange to optimize flow capacity. opyright 0 by Varec iogas a ivision of Westech Industrial Inc.

2 VRE 0 / 00 Series PRESSURE N VUUM RELIEF VLVES The 0 and 00 Series Pressure and Vacuum Relief Valves are available in a variety of configurations to meet your specific needs. Sizes 0/ 0: [0 mm], [0 mm], [0 mm], [ mm], [00 mm] [0 mm], [00 mm] 00/ 0: x, x, x, x x, x, x Flanged onnections (STNR FLNGE RILLING) rilled to NSI lass imensions (Flat-Faced) rilled to IN [ ar] imensions (Flat-Faced) S, I and SS ody rilled to NSI lass imensions, (Raised or Flat-Faced) rilled to Imperial IN [ bar] imensions (Raised or Flat-Faced) rilled to JPI or JIS (Raised or Flat-Faced) onsult your sales representative Testing Each valve is tested for proper setting and for a leakage rate of less than SFH (0.0 Nm / hr) of air at 0 percent of the set point. Each valve is tested for leak tightness at percent of set point as required in PI Standard 000. Parts and Materials Table Material ode Item ody Weatherhood Guide Stem Guide Posts Pallet Seat Ring Seat Ring Retainer Insert Insert Retainer Screen Gaskets O-Ring Weights HPE HPE arbon Steel arbon Steel HPE HPE uctile Iron arbon Steel HPE Note: - Materials are as standard. See model option code for other materials and their associated temperature ranges. - coated aluminum may be supplied with material codes - to achieve lower settings. - ll nuts and cap screws are. opyright 0 by Varec iogas a ivision of Westech Industrial Inc.

3 VRE 0 / 00 Series PRESSURE N VUUM RELIEF VLVES 0/ 0 SERIES Weight (/R) imensions, inches [mm] Size ode 0 Nominal Pipe Size Low Set High Set [0] / [] / [] / [] / [] / [] [0] / [] / [] / [] / [] / [] Note: Figure shown is for high set option. [0] / [] / [0] / [] / [] / [] [] [] [] / [] / [] / [] [00] / [] 0 / [] / [] / [] / [] [0] / [] [] / [] / [] / [] [00] / [] [] / [] / [] / [] imensions are for preliminary general information and should not be used for construction purposes. ertified dimensional drawings are available upon request. 00/ 0 SERIES E Weight (/R) imensions, inches [mm] Size ode 0 Nominal Pipe Size Low Set High Set E x [0 x 0] / [] / [] / [0] / [] / [] / [] x [0 x 0] / [] / [] / [] / [] / [] / [] Note: Figure shown is for high set option. x [0 x ] [0] / [] / [] / [] / [] 0 / [] x [ x 00] / [] [] / [] [] / [] / [] x [00 x 0] / [] / [0] / [] / [] / [] 0 / [] x [0 x 00] / [] / [] / [00] / [] / [] / [] x [00 x 0] / [] / [] [] [] / [0] / [] imensions are for preliminary general information and should not be used for construction purposes. ertified dimensional drawings are available upon request. opyright 0 by Varec iogas a ivision of Westech Industrial Inc.

4 VRE 0 / 00 Series PRESSURE N VUUM RELIEF VLVES Setting Information Minimum Pressure Set, oz/ in Minimum Vacuum Set, oz/ in Low Set Range High Set Range Size Pressure Vacuum Pressure Vacuum Lower settings may be available. Please consult your sales representative. Size T ll valves are factory tested for leakage and correct setting prior to shipment. ertification of valve setting is available upon request The mixed pressure/vacuum set ranges, 00 and 00 (Low Pressure/High Vacuum and High Pressure/Low Vacuum) use heavier pallets, and therefore have higher low set range minimums. For these cases, add the applicable value from the following table to the low set range minimum. (This increase does not apply for " and " 0/0.) opyright 0 by Varec iogas a ivision of Westech Industrial Inc.

5 VRE 0 / 00 Series PRESSURE N VUUM RELIEF VLVES Ordering Information Model escription 0 ir ushion Pressure/ Vacuum Relief Valve ode Model Vent-to-tmosphere Pipe-way ode onfiguration 0 Standard ir ushion Type ll Weather Type (- F to 00 F) ode Size ( x ) ( x ) ( x ) ( x ) ( x ) 0 ( x ) ( x ) ode ody/ Trim Material / (- F to 0 F) / Stainless Steel (- F to 0 F) arbon Steel/ Stainless Steel (-0 F to 0 F) Stainless Steel/ Stainless Steel (- F to 0 F) uctile Iron/ Stainless Steel ( to inch Only) (-0 to F) ode Insert Material T (- F to 00 F) (-0 F to 0 F) V Viton (- F to 00 F) ode Flange onnection FF Flat Face flange drilled to NSI with Fractional Studs MF Flat Face flange drilled to NSI with Metric Studs FR Raised Face flange drilled to NSI with Fractional Studs (Not vailable in ) MR Raised Face flange drilled to NSI with Metric Studs (Not vailable in ) F IN Flat Face Flange rilling R IN Raised Face Flange rilling (Not vailable in ) ode OP OS TP TS P S VP VS Gasket/ O-Ring/ and Retainer/ Screen Material Standard / and Plastic (-0 F to 0 F) Standard / and Stainless Steel (-0 F to 0 F) and Plastic (- F to 0 F) and Stainless Steel (- F to 0 F) and Plastic (-0 F to 0 F) and Stainless Steel (-0 F to 0 F) Viton and Plastic (- F to 0 F) Viton and Stainless Steel (- F to 0 F) ode Pressure Setting Range (See Table, pg. ) 0 Low Setting 0 High Setting ode Vacuum Setting Range (See Table, pg. ) 0 Low Setting 0 High Setting 0 0 T FF OP 0 0 (Example) Example: " Size ody/ SS Trim, Insert, FF Flanges, Standard / Gaskets, Low Set Pressure and Vacuum, Temperature Range: -0 F to 0 F. opyright 0 by Varec iogas a ivision of Westech Industrial Inc.