The awwa operating formula for openingclosing a gate valve is 3 times the nominal valve size plus 2 or 3 turns of the operating nut. Neway products are designed for a wide range of industrial applications and services. Body made of superior strength forgings and optional cast steel. Series dm gate valves, the premier gate valves in the oil and gas drilling market, are specifically engineered for the rigorous requirements of oilfield. Installation it is preferable to install the valve with vacuum on the backside of the gate so the valve body remains under vacuum at all times and the pumpdown of the valve body is eliminated. Damage may occur to valve seats as well as in valve. Types of gate valve and parts a complete guide for engineer. The fc valve has bidirectional sealing and a nonrising stem making it ideally suited for drilling manifolds, xmas trees, and severe service. The etype is a true bidirectional gate valve with low operating torque. The valve guard, poppets, springs and wear shims are conventional. T1 gate valve bronze, nonrising stem, threaded on nibco. Gate valves gear operated bare stem for actuation 2 piece bonnet design 4 pdf machine is a pdf writer that produces quality pdf files with ease.
This is an instructional video on how to maintenance the ss705 butterfly valve. Instead, they use guides and a gate made of metal to stop and start flow. This article is all about leaking gate valve problems and gate valves that dont operate correctly by martin smith an emergency plumber in manchester but also an agent that covers the whole of the uk with over 400 recommended engineers national. Mud line gate valves conform to api flange dimensions and pressure ratings. It is robust, easy to maintain, and is supported by our worldwide aftermarket teams. For gate valve seat replacement, a remotely operated seat repair tool srt delivers the severing tool to remove the existing seal weld. Gate valves are a simple valve that, unlike most other types of valves, do not depend on rubber gaskets to make a seal. Simply tighten the bolts equally until the leak stops.
These brands are available in various sizes, end configurations and operating pressures up to 2400 kpa24 barg 350psi. A leaky gate valve can be fixed simply by adjusting or completely replacing the washer or other packing material. Neway valve attended the fugitive emissions summit china, and advocated the development of new technology environmental protection. On top of the pike are quickdisconnect operators which are used to drive the pike. Valve repair kits replacement baker arrow packer repair. For indepth information, including assembly instructions, images and sizing charts, please see the submittal sheets below. Every so often, however, it may help to know how to rebuild a gate valve. Nve valves manual actuation closing manual actuation. Repairing leaky gate valves in our line of work, we field questions from contractors and technicians concerning repairs, installations, and general backflow prevention practices. Gate valve maintenance and adjustment procedure valve maintenance manual 3 i. When the gate valve is laid underground or it exposes with concrete fig. In some instances, particularly if the main control valve is a gate type valve, the valve may not close completely.
The operating manual and the corresponding safety instructions must be read and understood. This manual has been designed to assist, but it cannot replace quality training in the workplace. Ball valves, fittings, valves, actuation, press system, pex, chemtrol, pcv. A gate valve is the most common type of valve that used in any process plant. The packing glad is held into place by two hex head bolts. Procedures for preventative maintenance treatment of pipeline. Nibco gate valves are backed by the nibco 5year 125% limited warranty. Purchaser shall, if requested, return the part or parts to kennedy valve, transportation prepaid. Everyone has different opinions on these subjects and we would like to hear yours. B keep all parts of the control valve in a wellventilated place protected from fire, rain and wind. The closure member of gate valves either stops or allows flow through the valve and acts somewhat like the opening or closing of a gate. When the system pressure overcomes the spring pressure the valve feather will move in the seat creating an exit to. Gate and pressure relief valve kits for the oilfield industry on sale from mp industries.
When they dont, the water pressure in the home can be affected and leaks can form where the valve is faulty. Packer repair partskits friction springs packer cups stripper rubbers top packoff rubbers. Procedures for preventative maintenance treatment of pipeline ball valves in natural gas pipelines background pipeline ball valves are produced by a variety of manufacturers around the world. Gate valve figure numbers described in this manual.
C operate the elastomer oring type of pneumatic actuator at least once every six months to. A gate valve works by raising and lowering a gate into a seat with a screw mechanism to control the flow. The wedge, which is solid design, is forged or investment cast steel and is part of the valve trim. Thats pretty useful if a pump needs attention in midfebruary when theres ice and snow on the ground. Look into the valve and using a 2 hole saw, figure 5c, cut out the center of the gate. Procedures for preventative maintenance treatment of. To make your selection easier, nibco offers specification and submittal assistance. Experience tells us there are 5 places where the gate valve itself can begin to leak.
A valve feather under spring pressure is seated in the valve body and exposed to system pressure. Jul 20, 2012 a gate valve for a property usually has to be closed if plumbing repairs or maintenance are needed inside the building. Gate valves are under a lot of pressure to work properly. A gate valve for a property usually has to be closed if plumbing repairs or maintenance are needed inside the building. A gate valve is a lowtech solution for controlling the flow of fluids within pipes. Our tools consist of a long reach tool called a pike.
Oct 31, 2016 correct assembly procedure for the perolo 3 nd80 atco ball valve. Gate valve maintenance tools are longhandled tools that are used to reach into a small hole to perform various repair functions. Do not overtighten the adjusting nuts as this will. Gate valves for cameron style fc gate valve drilling. Unique parallel slide forged cage unit design comprises all operating parts of the slide discs. The valveworks usa model fc gate valves are handwheel operated valves.
Tag resilient wedge gate valves bonnet oring kit contents form 257 rev 916 tag resilient wedge gate valves coating repair process form 278 rev 1016 tag resilient wedge gate valves installation preparation checklist form 11624 rev 316. Remove the plug and shavings, leaving a hole, figure 5d. Wed like to share some questions that we receive as well as our answers. If the stem packing shows signs of leakage, simply tighten the adjusting nuts to compress the packing. Ok, initialy, make sure the water is off and the system is drained, or your going to get wet. Problems with gate valves are not common, but the one seen most often. Tuberculationdebris may have built up in the seat area, particularly in the double disc valve. Gate valves standard configurations basic cryogenic bellow seal gate valve description gate valves are primarily designed for onoff services when a straightline flow of fluid and minimum restriction is desired. The fls valve is our standard valve for critical requirements, including extreme sour and subsea applications.
If the valve has a rising stem its position can be seen just by looking at the position of the stem. Should any kennedy valve company part or parts fail to conform to the foregoing warranty, kennedy valve shall, upon prompt written notice thereof, repair or replace, f. They are pressed into the valve body and wedged into place, forming a seal with the body. Resulting from flow and vibration, degraded gate valves may require repairs to maintain proper functionality. I can use acrobat distiller or the acrobat pdfwriter but i consider your product a lot easier to use and much preferable to adobes a. Depends on valve size internal configuration valve depicted with bonnet grease fitting rotated toward flange component description qty 1 valve body 1 2 valve bonnet 1 3 slab gate 1 4 seat ring 2 5 body bushing 2 6 seat ring body bushing seals 4 7 retainer plate 2 8 gate guide 2 9 operating stem 1 10 bonnet seal ring 1 11 stem packing 1. Vent station and pump corresponding to gate valve to atmosphere. Contact the factory for repair of nonuserserviceable parts. Kravitch gate valve maintenance tools are longhandled tools that are used to reach into a small hole to perform various repair functions. No special tools are needed to change gate and seat assembly.
Spec a job, find your distributor, get catalogs and submittals, place. Set your store to see local availability add to cart. Once the body pressure is bled to zero you should then attempt to repair the. The anson etype gate valve is a throughconduit api 6a downstream sealing valve developed to satisfy the need for a highquality, highspecification valve for extreme and severe service. Market segment commercial valves industrial valves severe ball valves. Repairs to the gate valve through the valve box without digging. The valve seat on the other hand is made of two pieces. Do not overtighten the adjusting nuts as this will make operation of the valve more dif. May 24, 2018 gate valves are under a lot of pressure to work properly. The seat rings are steel and makeup part of the valve trim. Gate valve description gate valves are primarily designed for onoff services when a straightline flow of fluid and minimum restriction is desired. The closure member of gate valves either stops or allows flow through the valve and acts somewhat like the opening or closing of a gate and is called, appropriately, the gate valve. Gate valves work by inserting a rectangular gate or wedge into the path of a flowing fluid. Drawing and parts list for gate valve with hand wheel, stem extension set, chain wheel and.
If the valve has a rising stem its position can be. Preventative maintenance treatment of pipeline ball valves 2 the pipeline construction crew then preheats the pups or closures on each end of the valve prior to welding into the pipeline, welding takes place, the weld is xray inspected to verify the integrity of the weld. The hole will allow water to flow through the gate valve, while the remaining portion of the gate prevents leaking from the top. Always wear rubber gloves when handling the gate valve 1.
These brands are available in various sizes, end configurations and operating pressures up to 2400. The model fc gate valve is a field proven valve which provides reliability and interchangeability. The weld area is recoated or taped and the valve is. They are operated by a threaded stem which connects the actuator generally a hand wheel or motor to the stem of the gate. It is a linear motion valve used to start or stop fluid flow. Our repair solutions include seat removal and replacement, hardfacing repairs both base metal and stellite, body and flange area repairs, guide rib or gate preparation and repairs. The multiturn handle makes operation simple and smooth. The cameron fls gate valve is widely recognized as a highquality valve for severe applications, available in pressure ratings from 2,000 to 20,000 psi and bore sizes from 1 16 to 11 in. Hva valves are adjusted at the factory for horizon tal actuation. Get the assurance of the nibco warranty, along with superior customer service expertise.
A gate valve works by forcing a wedge shaped chunk of brass down into a slot. Gate valves are multipurpose bidirectional shutoff valves for commercial and industrial applications. Uniform standard details for public works construction. Many dimension one spas have a gate valve at each large jet pump to allow for easy repair or replacement without draining the spa.