double check valve installation double check valve installation
2" pipe is joined using 2" pipe coupling. (2) Open the main drain valve. When installing a check valve, a horizontal line is always preferred, because it takes gravity out of the equation. To install, simply push the valve fully on to the pipe. read more Double Check Valve. As the name suggests, two halves of the disk move towards the centerline with the forward flow, and with reverse flow two halves open and rest on the seat to close the flow. KECKLEY COMPANY 3400 CLEVELAND STREET P.O. Series 007 is ideal at referenced cross-connections identified as non-health hazard applications. This video illustrates how a Double Check Valve Backflow Prevention Assembly functions. W06 - Double Check Valve and Meter Assembly for Domestic Service at Commercial Sites.dwg; W06 - Double Check Valve and Meter Assembly for Domestic Service at Commercial Sites.pdf . It is ideal for municipal plows. 2. First, the Double-Check Valve Assembly. Rain Bird 3/4 in. Okay, here's the scenario, recently bought a house with extremely high pressure (120-160 static) and no PRV installed, the only means of backflow protection was a check valve installed inline with the first sill****, so I replaced the sill****s with self draining vaccum breaker models installed a watts model . Corrosion resistant, Designed for easy and quick in line maintenance and testing, Low head loss, Interchangeable poppet and spring, Maximum working pressure of 1200kPa, Operating temperature range of 1C to 82C up to 50mm BSP, Threaded, A butterfly check valve is known as a dual plate check valve, folding disc check valve, double-disc, or splits disc check valve. BOX 67 SKOKIE, ILLINOIS 60076 1-800-KECKLEY INSTALLATION - INSTRUCTIONS Keckley Wafer Double Disc - Wafer Silent & Globe Silent Check Valves INSTALLATION: Check valves should be installed, if possible, a minimum of 6 pipe diameters from other line elements, i.e. This style of riser has a control valve (part #9) but no check valve. MSRP: $ 99.95. body construction that is easy to maintain and service. INSTALLATION INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS 2 CRANE FLUID SYSTEMS DOUBLE CHECK VALVES CRANE FLUID SYSTEMS DOUBLE CHECK VALVES 3 It is the responsibility of the installer to ensure that the valves do not exceed the allowable limits of pressure. It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source. A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. Allow solvent cement to dry. All double check valve (DCV) and reduced pressure zone (RPZ) backflow prevention assemblies are designed for in-line service and must be installed to prevent freezing, flooding and mechanical damage with adequate space to facilitate maintenance and testing. Ideally, the installation should not require platforms, ladders or lifts for access. Weight of each plate is th the weight of swing disc. Hold the 2 pipes together for about 10 minutes. This can be either a registered break tank/air gap or a double check valve with the ability to incorporate a detector assembly if required. Caution: Do not weld flange after butterfly valve is installed to avoid damage to the rubber and anticorrosion coating. The two plates in Dual Plate Check Valve are hinged in the center vertically for horizontal installations, eliminating effect of gravity. 1" pipe slip-fits into valve ports. Open the isolation valve and flush the line thoroughly. Double check valves prevent the reverse flow of water into the potable water supply due to back pressure or back flow and is used for continuous or intermittent pressure conditions. Typical Larger than 2" Double Check Valve Assembly Only, Febco 850 Double Check Valve Assemblies View our resources list grid Default Compare 3/4" 850 Double Check Valve Assembly SKU: 1112 Febco (2) $210.69 each ADD TO CART Add to List Tue, Oct 4 - Tue, Oct 11 Compare 3/4" 850 Double Check Valve Assembly (Lead Free) SKU: 0683039 Febco (2) $290.15 each ADD TO CART Add to List Tue, Oct 4 - Tue, Oct 11 1. level 1. Roll over image to zoom in Zurn Wilkins 6-350ABG 6" Double Check Valve Assembly (DCVA) Supervised Grooved Butterfly Valves Lead-Free Save $5,687.01 Zurn Wilkins Price: $3,599.99 $9,287.00 Quantity: Add to cart Estimate Shipping 2 Free shipping on orders over $149 USD Description Installation represents a big chunk of your bill when adding a backflow preventer. Maintenance should be performed by following the guidelines set by the manufacturer. If you are installing your swing check valve on a horizontal pipeline, place it in the appropriate direction. If an irrigation system is connected to a potable water supply through a double check valve, pressure vacuum breaker, or reduced pressure principle backflow assembly . Recommended for use on Post-Mix Carbonated Beverage Equipment and dispensing equipment for tea and coffee. ProBalance range offers a wide variety of Flow Management Systems and Static Balancing Valves, providing the ultimate in accuracy and reliability. Watts Series SD3 is a dual check with atmospheric port designed for the protection of the water supply from carbon dioxide gas and carbonated water. The JG Speedfit double check valve is up to 40% faster to install than traditional methods and is easier to use in confined spaces by removing the need for hot works and tools. However, the equipment is . P 3 diaphragm prevents elevator effect. Typical Detail Valve and Valve Box Installation. The 2 " - 12" Backflow Preventer shall be an Apollo Model DCLF 4A Lead Free* Double Check Valve. (3) Open the inspector's test valve. Double Check Valve Assemblies, Designed for use in non-health hazard cross-connections and continuous pressure applications subject to backpressure or backsiphonage incidents, such as lawn sprinklers, fire sprinkler lines, commercial pools, tanks and vats, and food cookers. All installations must be inspected and approved by CWS. Double Door Check Valves (CDD) Specifications to accommodate the installation of most double check valve assemblies up to and including two inch sizes, a vault constructed of concrete, steel, cast iron or other durable material conforming to the dimensions described below is acceptable provided a twelve inch (12") clearance is maintained on the test cock High protection against mixing through innovative positioning of seat seals. Typical 1" - 2" Double Check Valve Assembly Only, Backflow Prevention Assembly Above Ground Installation. A DCVA is effective against backpressure backflow and backsiphonage but should be used to isolate only non-health . APCO carbon steel and stainless steel CDD Double Door Check Valves meet ASME/API 594 face-to-face dimensions and ASME B16.5 Flange Dimensions. Check Valves. They should always be installed in an accessible location to facili- tate testing and servicing. Valves have a Ductile Iron body (ASTM A-536 65-45-12) to fit inside 125# ANSI bolt circles, a two-piece Stainless Steel disc (ASTM type 304), type 304 Stainless . Double checks are rated for back pressure, and the amount varies on the device, but usually is within the burst point of the device ( mostly around 400 psi ) So generally unless there is 1000+ feet of elevation a double check is ok as long as the municipality allows them on irrigation. If your town or county requires a permit for this project, factor in at least . Retainerless valve design without body penetration for critical service applications. Ames Series 200B Double Check Valve Assemblies, Check local codes for installation requirements. If flow reverses it closes under its weight and is kept shut by backpressure acting on the closed flap. Also the momentum developed as they move to the closed position is only a fraction of what is developed in a swing check valve. The wafer flap valve is a slimmer version of the same . 5. Optional sterile barrier for critical . group_dcva_install_specification.pdf (71 KB) . Valves and fugitive emissions Fugitive emissions are no laughing matter, and val. Test the valve assembly to ensure correct operation. NOTE: All assemblies are tested at the factory for proper operation and leakage. Check valve shall be of the double disc, wafer style with torsion spring induced closure. 05/15/2020. The Double Check Valve from Buyers Products allows you to convert a latch pin plow application to power angle plows. Maintenance - easy, fast and safe. Place the glued PVC pipe into the check valve and turn it around at an angle so that the glue can spread evenly. Butterfly Check Valve. Crane Fluid Systems offers a full range of general valves, WRAS approved public health valves for hot and cold water systems and pipe fittings and unions, many of which carry the BSI Kitemark. Design differences of non-return valves and check valves. Backflow Preventer Installation Cost by Type. Should a check valve be installed vertically or horizontally? This will enable the pipes to form a strong . The assembly test cocks should be on top when the elbows are pointed down. Install check valve on the end of the vertical suction pipe in front of the pump. The Double Check Valve must be installed prior to the irrigation system and after the water meter. For this reason, swing check valves larger than about NPS 24 are frequently designed as multi-disc swing check valves, and have a number of conventional swing discs mounted on a multi-seat diaphragm across the flow passage in the valve. One check valve is designed for both 1" and 2" pipe. Second, the Reduced Pressure Zone Valve Assembly, often shortened to RP or RPZ, is thought of as the appropriate solution . 05/15/2020. Some valves needs outer protection, for example heat insulation and cold insulation. Click here for Product Info and Installation Instructions. Contact , CWS within two days of installation to request an inspection. If you are installing your swing check valve on a vertical pipeline, make sure the flow arrow is pointing up. W07 - Manifold for Multiple Meter Installation.dwg; W07 - Manifold for Multiple Meter Installation.pdf; W08 - Res Water Meter wo Backflow Preventer within Grass or . The RMC/Flomatic Double Check Valve is designed to give protection against medium hazard backflow situations. It depends on the risk the particular bespoke installation offers,preventing mains water contamination falls into 5 fluid categories 1-5 .A double check valve is not suitable for high risk contamination. Double checks will function when installed above/below grade and in vertical/horizontal orientation. Independent springs with long legs to prevent seat scrubbing and provide non-slam performance. If you need existing piping retrofitted, the labor can cost between $150 and $400. SD3-MF-6C. To install the double check valve assembly above ground outdoors: Run PVC from the isolation valve to the double check valve assembly location indicated on the site plan. Double check valves are typically two single check valves linked together, providing failsafe backup if one of the check valves fail for any reason. Install valve inline with arrow on valve body pointing in the direction of flow. A designer may specify one of 2 types of backflow prevention devices. . The valve is pilot-operated for smoother control. A strainer should be installed as shown, ahead of backflow preventer to prevent disc from unnecessary fouling. Look on your valve for an arrow that indicates the direction of flow. The stitch up is they're only suitable for low hazard applications. Contact , They have a bronze (1/2 to 2 in.) Assembly installation requirements for double check valve assem-, bly and double check detector assembly: 1)CONTACT LOCAL WATER PURVEYOR TO EN-, SURE YOU ARE INSTALLING THE CORRECT, ASSEMBLY FOR THE DEGREE OF HAZARD. Double check valve assemblies (DCVA) are the most commonly approved type of device for inline underground sprinkler systems and a good choice for interior or underground installations. The location of the assembly, service size, and hazard level of the connection determine which backflow assembly you should use. When should a double check valve be used? Features and benefits, Double check valve (Fluid Category 3) Install and demount in seconds without tools, So you'll need to check your local building code as well as your irrigation layout to determine if a dual check is suitable for your system. The "Apollo " Advantage "Apollo " Valves' backflow prevention devices are best in class, in terms of ease of maintenance.They utilize minimal size and shape. Also called bottom valve, the use of the check valve is to fill the pump with water once for all, so that you don't have to fill it every time when pumping water. BACKFLOW PREVENTION ASSEMBLY INSTALLATION GUIDE, DOUBLE CHECK VALVE ASSEMBLY (DCVA) , (3/4" - 2") Below Ground Installation, This insert serves as a guidance document for the installation of backflow prevention assemblies within the , Charleston Water System (CWS) service area. What is the difference between a Double Check Valve and a residential dual check? Product Common Use: Snow Plows. Reduction of water pressure and flow rate, $93.77. The assembly shall be for operation on hot or cold water lines and capable of withstanding a working water pressure of at least 150 psi (1,034 kPa) without damage to working parts or impairment of function. Below are some assemblies commonly used in commercial applications. 2) Assembly must be installed as a complete unit, including two shut off valves, two check valves, Subscribe Here:https://www.youtube.com/c/americanirrigator?sub_confirmation=1Watch this video next:https://youtu.be/d_TDNIlZOykIn this video you will see how. The Zurn Wilkins 350A Double Check Valve Backflow Preventer provides low hazard protection for all market segments. The grooved, epoxy coated ductile iron body is available with multiple shut-off valve options for installation versatility. For non-return valves the simplest design is the swing valve, with a weighted flap which is held open by forward flowing water. Pipe 4" Blowoff Assembly (Above Ground) Bell and Spigot Joint Bonding Detail Steel Cylinder Pipe . Have a question or two? 5. Economic and compact alternative to liftable and balanced double seat valves. (3) Protection facility. Pipe lines should be thoroughly flushed to remove foreign material before installing the unit. HCVD08 1/2 Inch NPT Double Check Valve. Apply and release air to one inlet port and note that gauge registers application and release. FPT In-Line Valve $19.39 Product Overview The 3/4" 350XLS Double Check Valve Assembly with Model SXL lead-free bronze wye type strainer is used in low health hazard, potable water applications for protection against both backsiphonage and backpressure of polluted water. A DCVA is a mechanical backflow preventer that consists of two independently acting, spring-loaded check valves. Check Valve Installation Guide Mercruiser If you ally need such a referred check . It includes shutoff valves at each end of the assembly and is equipped with test cocks. Buy in monthly payments with Affirm on orders over $50. Non slamming. 05/15/2020. Series 415 Double Disc Check Valve Series 415 Double Disc Check Valve Available with grooved ends for installation in either StrengThin Systems or Original Grooved Systems (OGS) Sizes from 2 - 18 | DN50 - DN450 Pressures up to 1200 psi | 8274 kPa | 83 bar General Questions? Technical Questions? Isolating Non-Health Hazards. For butterfly valve needs welding to pipeline should spot welding first then open all closure member and finish welding. Designed, manufactured and assembled in the UK. save $43.00 or more Join Item Details: This standard describes the double check valve backflow prevention assembly. The low weight and short laying length saves initial cost, requires less space, and is easier to install when compared to full-body, swing-type check valves. Double check valves also have screws on each side so that the valve port can be opened and cleaned, as debris can build up over time. Should the need arise to demount the connection push the collet towards the body of the fitting and pull the pipe to . If the valve does not pass the field test, it is most likely due to a fouled check valve. elbows, valves, strainers, etc. (1) Close the control valve. 4ALF-100 LBF Series. 8.1.1.2.2 Pressure gauges below check valves required by 16.9.11 and 16.15.2.2 (1) shall not be required. Attach Swing Check Valve onto Pipeline. How do you fit a double check valve? Model DCLF 4A. outside tap with hand held hose needs a double check valve to prevent possible backflow,washing machines/dish washers each need a single check . This Made in America assembly features Apollo ball valves with stainless steel handles and nuts as standard and carries the five-year Apollo factory warranty. Dual-plate designs that are compact and lightweight for efficient seating, operation and lower installation cost. Usages Series check valves are used in oilfield, chemical-industrial, power-station for checking the flow-backward of the material in the pipe. Double Check Valve Assemblies - 007 Series 007 Double Check Valve Assemblies prevent the backflow of contaminated water into the potable water supply. See drawing below. Zurn Wilkins 6-350ABG 6" Double Check. assemblies may be used to prevent backflow if the device is tested upon installation and: (1) a local regulatory authority does not prohibit the use of a double check valve; . As the size of swing check valves increases, weight and travel of the disc eventually become excessive for satisfactory valve operation. Assembly shall provide protection where a potential health hazard does not exist. (4) Wait for the sound of draining water to cease and for all gauges to indicate 0 psi (0 bar) before removing the handhole cover or dismantling any component. If you have questions about which type of assembly you need, contact the Water Bureau Water Quality Inspection staff at 503-823-7480. 8.1.1.2.1 A single pressure gauge shall be permitted to be installed on a manifold below multiple riser check valves or alarm check valves. DOUBLE CHECK VALVE ASSEMBLY (DCVA) , Above-Ground Installation, This insert serves as a guidance document for the installation of backflow prevention assemblies within the , Charleston Water System (CWS) service area. Typical Valve Installation AWWA C-900 P.V.C. It consists of a bronze (1/2 to 2 in) body construction that is easy to maintain and service. 1.3 Both Valves 45 or 90 fitting. Problem with double-check valve. Double Check Valve Installation Specification. Learn more. Installation conditions, Devices for fire services, Fire services need to be fitted with medium rated backflow prevention. All double check valve (DCV) and reduced pressure zone (RPZ) backflow prevention assemblies are designed for in-line service and must be installed to prevent freezing, flooding and mechanical damage with adequate space to facilitate maintenance and testing. Install an accurate test gauge in the outlet port or in a line from outlet port. This is often shortened to DC and is typically thought of as the appropriate solution for low hazard conditions. Series 007 Double Check Valve Assembly Backflow Preventers are designed to prevent the backflow of contaminated water into the potable water supply. In Stock. Supporting Documents. Double Disc Check Valve. $ 36.95. All installations must be inspected and approved by CWS. Dry-fit the rest of the loop before gluing. Labor costs for this job fall between $100 and $400. $ 74.95. Tighten Slip X MIP adapters into each shutoff valve using thread sealant compound. (Do not use) Double Check Alternate - Fire Department Connection 4", 6", 8" or 12" Step 4 - Glue. Take the PVC pipe ends that you have applied primer to and skillfully apply a sufficient amount of glue around the insides. 1. Glue three-inch lengths of PVC pipe and then elbows turned down into each adapter. Double Check Valve Backflow Prevention Assy. 1.2 2" - 2" Valve One check valve is designed for both 2" and 2" pipe. Prepare the double-check valve assembly. Additionally, "Apollo "'s backflow preventers process superior pressure drop ratings, boast an industry leading five-year warranty, and are domestic bronze and stainless steel constructed and assembled in the U.S.A. 3. After installation, SLOWLY fill the assembly with water and bleed air from the body using the # 3 and #4 test cocks. 2" pipe slip-fits into valve ports. 3/8"x3/8" Flare x FPT Dual Check Valve Vented Strainer ASSE 1022 Watts 0061657. Double Pilot Operated Hydraulic Check Valve, " NPT Ports, 11 GPM. MSRP: $ 99.95. Glue an elbow turned upward onto the supply line. Series 950XL double check valve assemblies by Zurn are designed for installation on potable water lines to protect against both back-siphonage and back-pressure of polluted water into the potable water supply. The double check valve only allows water to flow through in one direction, therefore, preventing backflow of potential contaminants. Valve shall be Wafer style for bolting between ANSI Class 125 flanges. Series 007 is ideal at referenced cross-connections identified as non-health hazard applications. Simple integration of flush/leakage valves into the equipment without welding. This standard. Dynamic Characteristics of Various Check Valves: SS-1886 Dynamic Characteristics: SS-1465 Application Chart: Chart Headloss Chart: SS-336 Exterior Metal Primer: SS-2564 Air Capacity for Series 8900: SS-2120 Design Selection of Check Valves: White Paper Dynamic Characteristics of Check Valves: White Paper Dual Disc Check Valve: PDF: CAD
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