Close Warning. Varec 5910B and 5920B Series Relief Valve with Flame Arrester Overview These units combine the high flow capacity of a pressure and vacuum relief valve with an. Free-opening or lock-down covers designed to provide quick access for product gauging, temperature measurement or sampling. Close. Ergonomically friendly handwheel with padlock feature to prevent unauthorized tank access. . Once open, the cover can remain open for ease of use. 7 kPa). Contact Varec Product Marketing for further information. The products of Varec are leading in this area. Varec 4310 Series Sampling and Gauging Hatch Covers Specs Product Type Lock-Down Hatches Resources. Locking mechanism (pin provided) raised above cover surface for easy access. Tank Vents and Hatches Bulk Storage and Transport Equipment Steam Traps Pressure Management Back. Tank Vents and Hatches; Emergency Relief Vents; Emergency Relief Vents Filter by Press enter to collapse or expand the menu. Are you looking for a reliable and accurate instrument to measure the liquid level in your low-pressure tanks? If so, you might be interested in the 2500 Automatic Tank Gauge (ATG) from Varec, a leading provider of tank gauging solutions. Compare. Large, easy to grab pull ring. 21 - $4,050. 03 Nm3/hr] or less at 90% of setpoint) Pallet drip ring and self-draining housing protect the seating surface from condensate and freezing. Enardo Model 2000 with Smart Wireless Technology. Enardo™ Series 850 High-Performance Pipe-Away Pressure Vacuum Relief Valves. The Model 2000 provides pressure relief only. Base made of corrosion-resistant 356-T6 aluminum. +358 207 416 208. Self-aligning cover closes automatically when the foot pedal is released. Specs. 3650B valves with flanged intake and discharge connections for ‘in-line’ applications. VAREC BIOGAS 42 Series Sampling and Gauging Hatch Cover. Specs. 2. Lock-Down Hatches Resources. Compare. Enardo Models 850 and 950 with Smart Wireless Technology. Varec is able to provide an alternative,Varec 4310 Series Sampling and Gauging Hatch Covers Specs Product Type Lock-Down Hatches Resources. Cover cannot separate from the base. . Varec - Tank protection products. Compare. Varec 4310 Series Sampling and Gauging Hatch Covers. The Varec 42 Series Hatch Covers are installed on tanks to provide access for gauging, temperature measurement or sampling. Features. Outlet adapter on the 2020B Series is one pipe size larger than the valve inlet flange to optimize flow capacity. The indicator moves up and down based on the level of product in the tank. NOTE: This product is approaching its end-of-life status. Ergonomically friendly handwheel with padlock feature to prevent. 1994 An Open Systems Approach. Size: 992kb. Vent to atmosphere or pipe-away models. Compare Compare Compare Add more to compare Added. Replaceable pressure and vacuum seat rings. PDFS. Replaceable pressure and vacuum seat rings. accessories below for further details. Size: 628kb. 8020; About Us; Careers; News; FAQ; Brands Portal; Products; Industries; Services; Education; ResourcesTank Vents and Hatches Bulk Storage and Transport Equipment Steam Traps Pressure Management Back. Varec 5910B and 5920B Series Relief Valve with Flame Arrester Specs Product Type Vacuum Valves, Tank, Relief Valves, Flame Arrestor. Download Resource. Choice of NBR, PTFE and FKM seat inserts. Available in emergency pressure only and emergency pressure and vacuum relief models. Get help from our experts for sales prices for products of Varec - 4310 8" THIEF HATCH in Turkey. Ovivo Inc. Both devices use Pt100 temperature sensors and are seamlessly integrated with servo gauges or other instrumentation via the intrinsically safe HART communications interface. Flame & Detonation Arrestors. Locking mechanism (pin provided) raised above cover surface for easy access. Base made of corrosion-resistant 356-T6 aluminum. The 2500 Automatic Tank Gauge (ATG) is a mechanically operated, float & tape instrument designed to provide continuous liquid level measurement in bulk storage applications. Once open, the cover can remain open for ease of use. Size: 91kb. Size: 541kb Manuals & Guides Manuals: Sampling and Gauge Hatch Covers Series 42 IOM, Varec-EN Features Non-sparking design. 1993 Approved by Microsoft®. Read more. Enardo™ Model 660 and 660-L Spring-Loaded Thief Hatch. LinkedIn; Facebook; Instagram; Youtube; About Us; Brands; News; Blog; Videos; Careers; Line Card; Contact Us Customer Portal6000 Servo Tank Gauge Installation and Operations Manual. Easily lifted open to provide a large, unobstructed passage for easy tank access. 8 SELECTION GUIDE Example: 221 20 1P0 B 1 1 Model. Features • Screw down and free lift designs • Corrosion resistant Aluminium, cast iron, carbon steel, stainless steel • O Ring. ‘All-weather’ coating option available for valve seats and guides. 877. Corrosion resistant 356 HT aluminum construction as standard. 3660B valves for either pressure (top mounted) or vacuum (side mounted) relief applications. Close. Corrosion resistant die cast 360 aluminium construction. Close. Flame & Detonation Arrestors. Choice of NBR, PTFE and FKM seat inserts. Condensate removal from gas piping systems is necessary to protect piping and equipment from possible damage caused by corrosion or water hammer. Similar switches are also used in a Varec 2910 FTT and 2557 ALS tank gauge transmit. Measurement Instrumentation; Corrosion & Erosion Monitoring Density - ViscositySupplying industries which include Oil & Gas, Petrochemical, food, water and Biogas. Varec 42 Series Sampling and Gauging Hatch Covers. Bulk Storage & Transport Equipment. Non-sparking design. Features • Screw down and free lift designs • Corrosion resistant Aluminium, cast iron, carbon steel, stainless steel • O Ring seal • ANSI and DIN flanges • Sizes. Control and Safety Systems. The Dip hatch main function is to allow easy access to storage tanks while controlling vapor losses. Data Sheets: Safety Relief Valves Series 4210A Emergency Vent, Anderson Greenwood, Tank Vents & Hatches (VCTDS-02326-EN) Author: Emerson Subject: An emergency relief vent in a range of sizes and materials capable of handling pressure flows up to 188,000 cubic meters per hour Keywords: Anderson Greenwood, Tank-Vents-Hatches,. 221PV incorporates a spring loaded vacuum relief valve integral to the cover assembly. Large flow capacity allows use of smaller size. Protective screen prevents entrance of foreign material. Product request. 10ft or 3 meters) to provide uniform support. Positive sealing soft seat inserts in NBR as standard; PTFE and FKM optional. Leadership; Environment, Social, Governance. , doing business as Varec Biogas (“Varec Biogas”), a wholly-owned subsidiary of Westech Industrial Ltd. Data Sheets: 7000 series mushroom (free) vents, Varec, Tank Vents & Hatches (VCTDS-00307-EN) Author: Emerson Subject: Corrosion resistant, lightweight vents with a large opening and streamlined weather hood designed to minimize back pressure Keywords: Varec, Tank-Vents-Hatches, Lock-Down-Hatches Created Date: 7/13/2017 8:58:08 AM Features. 2 B a dia. Ergonomically friendly handwheel with padlock feature to prevent unauthorized tank access. 7 kPa). Locking mechanism (pin provided) raised above cover surface for easy. Project ServicesVarec 4310 Series Sampling and Gauging Hatch Covers | Emerson GB. The VAREC 42 Series Hatch Covers are installed on tanks to provide access for gauging, temperature measurement or sampling. Understanding Design Codes and Standards for Biogas Systems. Support Brackets "A" frame brackets support the conduit (pipework) that carries the tape. Zero product loss when combined with a vapor recovery system. Enardo™ 950 Dimensions Table 1. Industries; Back. Vent to atmosphere or pipe-away models. Features. Data Sheets & Bulletins Data Sheets: 4310 series sampling and gauging hatch covers, Varec-EN Features. Replaceable ‘air cushion’ PTFE seating for lowest available leakage for weight-loaded valves (1 SCFH [0. Flame Arrestor Thief Hatches Vapor Recovery Regulator Detonation Arrestor. Features. Lock-Down Hatches Resources. Varec no longer supports discontinued products, although some documentation may be available for download. The Hatch Covers are provided with a lockdown device that allows for a gas-tight seal up to 3 psig [20. Compare Compare Compare Add more to compare Added. 3600B valves are side mounted. Lockdown device allows for a gas-tight seal up to 3 psig (20. It is available in a range of sizes from 4” through 12”, and can be ordered with one of the two optional clamp covers. Lock-Down Hatches Varec 4310 Series Sampling and Gauging Hatch Covers Free-opening or lock-down covers designed to provide quick access for product gauging, temperature measurement or samplingVarec top guide wire anchors can be screwed or welded into the tank roof, maintenance hatch, or manhole cover. This manual provides installation and operation instructions for the latest version of the device, updated in October 2022. Specs Product Type Lock-Down Hatches Resources PDF Size: 91kb Data Sheets & Bulletins Data Sheets: 4310 series sampling and gauging hatch covers, Varec-EN. Cover cannot separate from the base. Weather hood and screen provided for protection. All-weather coating option available for valve seats and guides. Position the roof connection installation into the tank interior within arms reach of a manhole or an inspection hatch. EN English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian český русский български العربية Unknown Choice of NBR, PTFE and FKM seat inserts. This document provides you with the technical specifications, features, benefits, and installation instructions of the 2500. 1-23 of 48 results in Products. Hood is easily removed for inspection and maintenance. Carbon steel base construction available for welding to the tank roof. Zero product loss when combined with a vapor recovery system. 3650B valves with flanged intake and discharge connections for ‘in-line’ applications. 08. Ergonomically friendly handwheel with padlock feature to prevent unauthorized tank access. For ease of use, the lockdown device includes an ergonomically friendly handwheel. Non-sparking design. Varec-EN PDF. Specs. $3,748. Close. Extensible flame arrester bank assembly. Hinged cover provides a fixed pivot point, ensures proper reseating and added safety. Measurement Instrumentation; Corrosion & Erosion Monitoring Density - ViscosityVAREC Safety Selector Valve DUAL PRESSURE RELIEF DEVICE SYSTEM The Safety Selector Valve is designed to function as a switchover device that permits servicing of pressure relief devices with no process interruption. Oversized flame arrester bank assembly for minimum pressure drop. Close. Large, easy to grab pull ring. Under the name of Neill-Varec, the company manufactured tank level measuring devices, pressure relief. 2 Featuring a metal-to-metal seat, foot pedal for easy opening, and a tape gauge marker. Cover cannot separate from the base. Features. Durable reinforced fabric diaphragm type pressure side seating surface backed by compressible, cellular non-metallic pads for added cushion and reduced leakage. Maximum working pressure for the clamped cover. Padlockable to prevent unauthorized tank access. All-weather coating option available for valve seats and guides. Replaceable and interchangeable pressure and vacuum seat rings. Want to thank TFD for its existence?Varec 4310 Series Sampling and Gauging Hatch Covers | Emerson US. Free-opening or lock-down covers designed to provide quick access for product gauging, temperature measurement or. 7 kPa). Controllers and Instruments. Support Brackets "A" frame brackets support the conduit (pipework) that carries the tape. If you are looking for a high-performance pressure vacuum relief valve that can handle very cold and sticky applications, you should check out the Enardo 850 data sheet. Oversized port for maximum flow. These brackets can be welded or bolted to the tank and shouldthe hatch. Hinged cover provides a fixed pivot point, ensures proper reseating and added safety. Construction The standard VAREC 42 Series Hatch Covers are available in 356 HT aluminum construction. The pioneer in tank gauging since 1928, providing total visibility and management of your bulk liquid assets | Varec, a wholly owned. Stainless steel (in both sizes) and aluminum (in the NPS 8 (DN 200) size) bases available. Enardo™ Model 660-B and 660-LB Spring-Loaded Thief Hatch. 4 Varec, Inc. Back. 1990. Emerson. Cover cannot separate from the base. Lock-Down Hatches Resources. Non-sparking design. The wireless monitoring option allows the remote sensing of the open or closed position of the vent which enables. Lockdown device allows for a gas-tight seal up to 3 psig (20. Back. Data Sheets & Bulletin: 4310 series sampling and gauging hatch covers, Varec, Tank Vents & Hatches (VCTDS-00311-EN) Author: Emerson Subject: Free-opening or lock-down covers designed to provide quick access for product gauging, temperature measurement or sampling Keywords: Varec, Tank Protection, Tank Accessories, Gauge Hatches Created Date Varec 4310 Series Sampling and Gauging Hatch Covers. Optional materials available to suit most chemical applications. Manuals & Guides. Back. 7 kPa). Emerson. Weather hood and screen provided for protection. Size: 1. Designed to bolt directly to a standard 150# flat faced ANSI flange on the tank top. Once open, the cover can remain open for ease of use. Safety foot pedal allows fast, hands-free tank access for sampling and [email protected] Varec 2500 Tank Gauge Replacement Part - Back Cover Gasket - C (2013 & Later), Item # 1c $59. Enardo™ Model 1000 Lock-Down Hatches. Safety foot pedal frees operator’s hands while gauging or sampling the tank contents. Lockdown device allows for a gas-tight seal up to 3 psig (20. Unlimited document download and read ad-free! No annoying ads and unlimited download of all publications. Steam Traps, Valves and Level Gauges. The information in this instruction manual is not all inclusive and does not and cannot take into account all unique situations. Cover cannot separate from the base. PDF. Safety foot pedal frees operator’s hands while gauging or sampling the tank contents. VAREC NEG. Zero product loss when combined with a vapor recovery system. 00 LBS. Varec 5910B and 5920B Series Relief Valve with Flame Arrester Specs Product Type Vacuum Valves, Tank, Relief Valves, Flame Arrestor. 7 kPa). Choice of NBR, PTFE and FKM seat inserts. All products are designed and manufactured out of our custom built factory based in St Helen’s, UK. /Testing Center Pressure and Vacuum Relief Valves Emergency Relief Manhole Covers Roof Manhole Covers Sample And Gauging Hatches Flame Arresters Detonation Flame Arresters Vapor Control. Positive sealing soft seat inserts in NBR as standard; PTFE and FKM optional. Varec 4310 Series Sampling and Gauging Hatch Covers. Once open, the cover can remain open for ease of use. Close About Us; Careers; Sustainability. 7 kPa). (Elements & Compounds) the ash obtained from kelp. seaweed; the calcined ashes of coarse seaweeds used for the manufacture of iodine, potash, and formerly soda : kelp… See the full definitionvarec. 2. Corrosion resistant die cast 360 aluminium construction. Valve Controllers & Instruments; Digital Valve Controllers Discrete Valve Controllers Level Sensors and Controllers Configuration & Diagnostic Software PositionersVarec Biogas. PDF. Optional steel base available for welding to the tank roof. 8020; About Us; Careers; News; FAQ; Brands Portal; Products; Industries; Services; Education; ResourcesThe 2500 Automatic Tank Gauge is a mechanically operated, float and tape gauge that provides continuous and accurate level measurement for oil and gas tanks. Side and center-guided pallet. BackProtective screens at pressure and vacuum ports prevent entrance of foreign matter. Our tank protection offering now includes Anderson Greenwood™, Amal™ and Varec™ technologies in addition to our existing Fisher™ and Enardo™ solutions. Design The Dual Pressure/Vacuum Relief Valve provides redundant pressure and vacuum relief and flame arresters to protect from overpressure and vacuum condition in theGauge/Dip Hatches Series 5031-5032 SIM Approved Tyco reserves the right to change the content without notice WEVDR-0001-EN-0209 The Whessoe - Varec Vapour Control 5031 & 5032 dip hatch are specifically designed for the French market where a SIM approval is mandatory for manual gauging, temperature measurement or sampling. Corrosion resistant aluminum construction ensures durability and minimizes weight. Zero product loss when combined with a vapor recovery system. Varec, a wholly owned subsidiary of Leidos, is a leading innovator in inventory management applications to automate bulk liquid management at tank farms, marketing terminals and fuel distribution points within the oil and gas, defense & aviation industries. Varec Series 7000 Mushroom (free) Vents. 3600B valves are side mounted. Steam Traps, Valves and Level Gauges. Varec Enardo Groth Protectoseal Shand & Jurs (L&J Technologies) Vapor Relief and Control: On-Site Vapor Relief and Control. Tank Vents and Hatches; Pressure/Vacuum Relief Valves; Pressure/Vacuum Relief Valves Filter by Press enter to collapse or expand the menu. Data Sheets & Bulletin: 221 series emergency pressure relief manway covers, Varec, Tank Vents & Hatches (VCTDS-00310-EN) Author:Outlet adapter on the 2020B Series is one pipe size larger than the valve inlet flange to optimize flow capacity. 1-4 of 4 results in Products. Weather hood and screen provided for protection. through the hatch. Close Warning. Manuals & Guides Manuals: Sampling and Gauge Hatch Covers Series 42 IOM, Varec-EN Features. Lockdown device allows for a gas-tight seal up to 3 psig (20. Features • Screw down and free lift designs • Corrosion resistant Aluminium, cast iron, carbon steel, stainless steel • O Ring. The 6700 Liquid Level Indicator (LLI) is an economical, easy to install measurement device utilizing a target and gauge board to indicate tank level. Compare Compare Enardo™ Model 1000 Lock-Down Hatches. Pressure/Vacuum Relief Valves (34) Emergency Relief Vents (6) Deadweight Hatches (4) Free Vents (3) Lock-Down Hatches (3) Spring-Loaded Hatches (1) Filter by Press enter to collapse or expand the menu. 1995 New Technologies. Ergonomically friendly handwheel with. Protective screens at pressure and vacuum ports prevent entrance of foreign matter. Rosemount™ 500 Process Gas Chromatograph. Storage & Distribution; Storage Flow Measurement Level MeasurementFind many great new & used options and get the best deals for VAREC 4300 Aluminum Sampling & Gauge Hatch Cover 4" ANSI 125/150 Bolt Circle at the best online prices at eBay! Free shipping for many products!jayco thief hatches are designed for optimum performance and easy cleaning and maintenance, and are available in 8 inch round and 20 inch long pan, with standard settings of 4. 7 kPa]. Choice of NBR, PTFE and FKM seat inserts. Enardo™ Series 800-SO In-Line Pressure Vacuum Vent. Outlet adapter on the 2020B Series is one pipe size larger than the valve inlet flange to optimize flow capacity. Without a secondary safety net like the 400W Series provides, tanks are susceptible to explosion or implosion as pressure. Control and Safety Systems Back. PDF. Compare. 7 kPa). Features. Large, easy to grab pull ring. 1. Base made of corrosion-resistant 356-T6 aluminum. Biogas is produced during the biological breakdown of organic solids through anaerobic digestion. Get the best spare parts prices from a single source, don't waste time seeking for different suppliers when you can just go with one. Protective screens at pressure and vacuum ports prevent entrance of foreign matter. Tank Vents & Hatches. All-weather coating option available for valve seats and guides. 7 kPa). Outlet adapter on the 2020B Series is one pipe size larger than the valve inlet flange to optimize flow capacity. Varec 42 Series Sampling and Gauging Hatch Covers. Enardo™ Series 800-SO In-Line Pressure Vacuum Vent. Replacement Counter Cover Gasket (Item: 6) for Varec 2500 Tank Gauge. Padlockable to prevent unauthorized tank access. Close. Varec 4310 Series Sampling and Gauging Hatch Covers - Emerson. Non-sparking design. Once open, the cover can remain open for ease of use. 4590 Tankside Monitor. Self-aligning cover closes automatically when the foot pedal is released. Safety foot pedal frees operator’s hands while gauging or sampling the tank. Varec, Inc. Tank Vents and Hatches; Emergency Relief Vents; Emergency Relief Vents Filter by Press enter to collapse or expand the menu. Tank Vents and Hatches Select a Category Press enter to collapse or expand the menu. Zero product loss when combined with a vapor recovery system. Large, easy to grab pull ring. 3600B valves are side mounted. • ergonomically friendly handwheel with padlock feature to prevent. Outlet adapter on the 2020B Series is one pipe size larger than the valve inlet flange to optimize flow capacity. Size: 541kb. Features • Screw down and free lift designsVarec 4310 Series Sampling and Gauging Hatch Covers; Varec 4310 Series Sampling and Gauging Hatch Covers. Close. These brackets can be welded or bolted to the tank and should the hatch. Varec 4310 Series Sampling and Gauging Hatch Covers | Emerson US. Varec gauge hatches are essential for accurate level measurement and monitoring in tanks or vessels. Replaceable and interchangeable pressure and vacuum seat rings. Varec Series 7000 Mushroom (free) Vents | Emerson US. Compare. Facebook; Linked in; Twitter; 24/7 After Hours Support 1-877-827-8131; Brands; Contact Us; Careers; News RCC Login; Customer Survey; Covid-19 Message; Customer PortalGasket. Non-metallic seat insert on the pallet minimizes leakage. These brackets can be welded or bolted to the tank and should be placed at regular intervals (approx. (“Ovivo”), a global provider of water and wastewater treatment equipment, technology and systems, is pleased to announce the acquisition of Westech Industrial Inc. The Whessoe - Varec Vapour Control 5071A & 5072A dip hatches are designed to provide tank access where manual level gauging, temperature measurement or sampling is required. Hinged cover provides a fixed pivot point, ensures proper reseating and added safety. 3660B valves for either pressure (top mounted) or vacuum (side mounted) relief applications. Lecore Dip Hatches are supplied with “O” ring seats in nitrile rubber for easy maintenance. The wireless monitoring option allows the remote sensing of the open or closed position of the vent which enables. PDF. Ergonomically friendly handwheel with padlock feature to prevent unauthorized tank access. Size: 541kb. Vents directly to atmosphere. gas-tight seal up to 3 psig [20. Anderson Greenwood 5910C. Size: 541kb. Features • Screw down and free lift designsVarec 4310 Series Sampling and Gauging Hatch Covers; Varec 4310 Series Sampling and Gauging Hatch Covers. 7 kPa). Free-opening or lock-down covers designed to provide quick access for product gauging, temperature measurement or sampling Read more. Data Sheets & Bulletins Data Sheets: 4310 series sampling and gauging hatch covers, Varec-EN Features. Introduction The VAREC 220 Series Roof Manway Covers are designed for quick, easy access to storage tanks. 7 kPa) inVarec top guidewire anchors can be screwed or welded into the tank roof, maintenance hatch or manhole cover. • Knowledgeable in API 6A and ABS CDS standards. Features. Safety foot pedal frees operator’s hands while gauging or sampling the tank. 7 kPa). Zero product loss when combined with a vapor recovery system. Data Sheets: 7000 series mushroom (free) vents, Varec, Tank Vents & Hatches (VCTDS-00307-EN) Author: Emerson Subject: Corrosion resistant, lightweight vents with a large opening and streamlined weather hood designed to minimize back pressure Keywords: Varec, Tank-Vents-Hatches, Lock-Down-Hatches Created Date: 7/13/2017 8:58:08 AMVarec 42 Series Sampling and Gauging Hatch Covers Specs Product Type Lock-Down Hatches Features. Size: 541kb. 2500 Automatic Tank Gauge. Phone. Product Type: Lock-Down Hatches: Related products. January 27,2020. Large, easy to grab pull ring. Enardo™ Model 660 and 660-L Spring-Loaded Thief Hatch. 3660B valves for either pressure (top mounted) or vacuum (side mounted) relief applications. Locking mechanism (pin provided) raised above cover surface for easy access. Clear All Brands. Weather hood and screen provided for protection. Measurement Instrumentation; Flame and Gas DetectionFacebook; LinkedIn; Youtube; COVID-19 Response; Emergency Support and Service 888-268-6437; Careers; Resources; News; Company Store Customer Portal; About UsVarec 4310 Series Sampling and Gauging Hatch Covers - Emerson. Add to Cart. Our company is not an official. Compare. Non-sparking design. Corrosion resistant aluminum construction ensures durability and minimizes weight. Corrosion resistant 356 HT aluminum construction as standard. table of contentsTank Vents & Hatches. Close. FEATURES. installed on tanks to provide access for. Designed to offer flexibility of installation. Learn how. Close. Products; Back. PDF. Data Sheets & Bulletins. Compare CompareProtective screens at pressure and vacuum ports prevent entrance of foreign matter. 03 They are particularly beneficial for tank operators, maintenance personnel, and inspectors who need to regularly monitor and manage fluid levels in. Compare Compare Enardo™ Model A Deadweight Thief Hatch. Emerson Automation Solutions Americas T +1 800 558 5853 T +1 972 548 3574A D E C B 950 2 1 1 1 2 n 12 n 6 C 0 72 Enardo 950 High Performance PVRV Vent-to-Atmosphere Figure 2. Natural Gas Chromatographs. Positive sealing soft seat inserts in NBR as standard; PTFE and FKM optional. Varec 5910B and 5920B Series Relief Valve with Flame Arrester Overview These units combine the high flow capacity of a pressure and vacuum relief valve with an easy-to-maintain. Varec 4310 Series Sampling and Gauging Hatch Covers. Emerson. Close. Learn how to install, configure, maintain and troubleshoot the. Designed to offer flexibility of installation. PDF. Lockdown device allows for a gas-tight seal up to 3 psig (20. Non-sparking design. Close. Choice of NBR, PTFE and FKM seat inserts. PDF. Valve Controllers & Instruments; Digital Valve Controllers Discrete Valve Controllers Level Sensors and Controllers Configuration & Diagnostic Software Positioners.