VAREC 5810B/5820B Series. Relief Valve and Flame Arrester

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1 VAREC 0B/0B Series The 0B/0B Series is a combination of the 00B/00B Series and Relief Valve and the 000 Series Flame Arrester. INTRODUCTION The VAREC 0B/0B Series Relief Valve and Flame Arrester is a combination of the VAREC 00B/00B Series and Relief Valve and the VAREC 000 Series Flame Arrester. This unit combines the high flow capacity of a relief valve with the easy-to-maintain extensible bank flame arrester for maximum protection and reliable operation. OPERATION Whenever the system gas pressure or vacuum exceeds the setting, the pallet lifts. Only excess pressure is vented to the atmosphere. Air is drawn into the digester only to relieve an excess vacuum condition. The valve remains closed when the gas utilization system remains within normal operating pressure. The valve pallets are deadweight loaded with a field adjustable pressure setting range. Side and center pallet guides are incorporated for stability. Air cushion Teflon seat inserts ensure a tighter seal. Removable seats can be easily replaced. The case outlet adapter on the pipeaway model is one pipe size larger than the valve inlet flange to optimize flow capacities. The All-weather models feature a special non-frosting and icing-resistant coating. This coating is applied to the pallet perimeter and stem, guide posts, and seat ring tip. This feature provides additional protection against pallets freezing closed. The flame arrester stops the propagation of a flame by absorbing and dissipating heat through the surface area of the bank sheets. Heat is absorbed as ignited gas attempts to pass through the small passages within the bank assembly. This action lowers the temperature of the gas below its ignition point and quenches the flame. 0B The net free area through the flame arrester bank is three to four times the unit pipe size. This design provides increased flow capacity with minimal pressure drop. The unique extensible bank frame allows inspection of the corrugated sheets, and routine cleaning without removal from the frame. The entire bank assembly slides out easily from the arrester housing. It is not necessary to disassemble the flame arrester from the relief valve, nor remove the entire unit off the pipeline. The extensible bank feature is especially useful when there is excessive foaming in the digester. The bank assembly can be easily inspected 0B and cleaned to remove any scum or residue build-up. DESIGN FEATURES Oversized pressure and vacuum ports for maximized flow capacities Extensible flame arrester bank assembly Replaceable pressure and vacuum seat rings All-weather coating option available for valve seats and guides Vent to atmosphere or pipe-away model Copyright 00 by Varec Biogas a Division of Westech Industrial Inc. Revision January 00.

2 VAREC 0B/0B Series APPLICATION The 0B/0B Series and Relief Valve with Flame Arrester are installed on anaerobic digester covers or low-pressure gas holder roofs. The relief valve protects the cover from excessive pressure and vacuum within the tank. It maintains system operating pressure so waste gas is not routinely vented to the atmosphere. The flame arrester protects the tank from accidental ignition of sludge gas within the digester or gas holder. It is designed to stop the propagation of flame from external sources. For further information on these devices, see the product data sheet for 00B/00B, and 000/00. A variety of materials are available to suit climate conditions. The standard aluminum construction is suitable for moderate climates. In extreme hot, humid or freezing weather, the All-weather B Series is recommended. This design incorporates extra features that reduce potential malfunctions from these extreme conditions. The 0B Series provides for further protection from cold climates and provides a means to route vented gas instead of venting to atmosphere. This unit incorporates an enclosed pressure port on the relief valve. It is especially suited for field installation on insulated shelters. The B Series includes the pipe-away outlet and the All-weather features for maximum cold weather protection. If H S Corrosion is a concern, supplying the relief valve with SS trim is an option. The flame arrester bank sheets are also available in SS material. Benefits Large flow capacity allows use of smaller size Easy maintenance Reduces maintenance time and replacement cost Valve will operate at temperatures to - F [- C] Application flexibility for either weather or emissions considerations SPECIFICATIONS Sizes 0B -,,,,, 0 and 0B - x, x, x, x, x 0, 0 x, and x Connections Drilled to ANSI /0 Flat-Faced flange connection. All-Stainless Steel: Drilled to ANSI 0 Raised-Face flange connection. Special drilling requirements to DIN, JPI or JIS standards are available upon request. Consult factory or your local sales representative for further details. Flow Data Consult factory for flow data information. Valve sizing programs are available upon request. Settings and : Variable in wc increments. Specify required range. Note: / wc and / wc increments, or other settings, are available upon request. Materials Valve Body T low copper cast Aluminum Stainless Steel (Option) Valve Trim Low copper aluminum with SS guideposts (standard) Stainless Steel (option) Pallet Seat Inserts Teflon Pallet weights Lead Protective Screen HDPE (high-density polyethylene) Arrester housing T low copper cast aluminum Stainless Steel (option) Bank Assembly Low copper aluminum extensible frame with aluminum bank sheets (standard) Low copper aluminum extensible frame with SS bank sheets (option) All Stainless Steel (option) Hardware Zinc-plated steel (standard) (nuts, bolts, etc): Stainless Steel (option) Mounting Hardware per ANSI standards (supplied by others) All-Weather Option Relief valve operating temperature is - F to 00 F [- C to C] Standard Specification Model 000 Flame Arrester UL (Underwriters Laboratories) listed in all Aluminum Construction with extensible bank assembly in,,, and 0 sizes. Flame Arresters installed not more than feet from the open end of the vent pipe. These test conditions may not represent the actual service conditions or piping system design. It is recommended that the arrester be independently tested under actual service conditions before installation. Note Teflon is a registered trademark of E.I. du Pont de Nemours Company. Copyright 00 by Varec Biogas a Division of Westech Industrial Inc.

3 VAREC 0B/0B Series DIMENSIONS 0B SERIES 0B SERIES Note. Aluminum bodies Flat Face only. Stainless and carbon steel Raised Face only. 0B Dimensions, inches [mm] Size A B 0 / / [] [] / / [] [] 0 / / [] [] / / [000] [] / [] [] / [] [] / / [] [] 0B Dimensions, inches [mm] Size Inlet Outlet 0 0 A B C+ / [] D / / / / [] [] [] [] / / / / [] [] [0] [] / / / [] [] [] [0] / / / / [0] [] [0] [] / / / / [] [] [00] [] / / / [] [] [] [] / / / / [] [] [] [] Dimensions are for preliminary general information and should not be used for construction purposes. Certified dimensional drawings are available upon request. Website: info@varec-biogas.com --BIOGAS

4 VAREC 0B/0B Series Consult Factory for flow curves of higher set pressure. COMBINATION 00B VALVE AND 000 FLAME ARRESTER, SET AT 0. INCH OF WATER 0 0 With API Std Certified Test Data by Independent Laboratory Available on Request Copyright 00 by Varec Biogas a Division of Westech Industrial Inc.

5 VAREC 0B/0B Series COMBINATION 00B VALVE AND 000 FLAME ARRESTER, SET AT INCH OF WATER With API Std Certified Test Data by Independent Laboratory Available on Request Website: BIOGAS

6 VAREC 0B/0B Series COMBINATION 00B VALVE AND 000 FLAME ARRESTER, SET AT INCHES OF WATER 0 0 With API Std Certified Test Data by Independent Laboratory Available on Request Copyright 00 by Varec Biogas a Division of Westech Industrial Inc.

7 VAREC 0B/0B Series COMBINATION 00B VALVE AND 000 FLAME ARRESTER, SET AT INCHES OF WATER With API Std Certified Test Data by Independent Laboratory Available on Request Website: info@varec-biogas.com --BIOGAS

8 VAREC 0B/0B Series COMBINATION 00B VALVE AND 000 FLAME ARRESTER, SET AT INCHES OF WATER 0 With API Std Certified Test Data by Independent Laboratory Available on 0 Request Copyright 00 by Varec Biogas a Division of Westech Industrial Inc.

9 VAREC 0B/0B Series ORDERING INFORMATION Model Description Code Configuration Vent to Atmosphere Pipe-Away Code 0B B Model Air Cushion Type All Weather Type Code Size (Pipe-Away option) (x ) (x ) (x ) (x ) (x 0 ) 0 0 (x ) (x ) Code Material (Must specify one) All-Aluminum Construction Aluminum body and trim on valve, aluminum housing, extensible frame and sheets on flame arrester, ANSI FF flange connections Aluminum/Stainless Steel Construction Aluminum body and stainless steel trim on valve; aluminum housing and extensible bank, stainless steel sheets on flame arrester, ANSI FF flange connections All-Stainless Steel Construction SS body and trim on valve, stainless steel housing, frame and sheets on flame arrester, ANSI 0 RF flange connections Code Flame Arrester Hardware Material * Leave blank when ordering standard zinc plated steel S Stainless Steel (optional) 0B S (Example) Example: / Relief Valve with Flame Arrester, vent to atmosphere, air-cushion type, size, aluminum body and stainless steel trim on valve; aluminum housing and extensible bank, stainless steel sheets on flame arrester, stainless steel hardware. Specify pressure and vacuum settings along with variable pressure range if required. 0B Shipping Weights, lbs. (kg) Size Material Code () () () () () () (0) () () () (0) () 0 () () 0 () 0 (0) () 0 () (00) (0) (0) 0B Shipping Weights, lbs. (kg) Size Material Code () () () 0 () () (0) () () () () () () () () () 0 () () () () () (0) Note. Carbon Steel available on request. --BIOGAS The data presented in this bulletin is for general information only. Manufacture is not responsible for acceptability of these products in relation to system requirements. Patents and Patents Pending in U.S. and foreign countries. All rights reserved. Printed in USA. 00.