This guide identifies some of the more common problems encountered and their necessary corrective actions. Jul 25, 2016 globe valves contain a few moving parts such as the disk, the valve stem, and the hand wheel. Warningdo not attempt to perform maintenance on valves in pressurized lines. Pressure relief valve maintenance this is what you should expect from your repair facility. The coefficient is used to determine the size that will best allow the valve to pass the desired flow rate, while providing stable control of the process fluid. For gate and globe valves, sometimes material in the line can get stuck between the disc and seating area. Maintenance of globe valves is relatively easy, as the discs and seats are readily refurbished or replaced. Check valves or non return valves are designed to ensure one way flow only. The oblique pattern globevalve body is designed to reduce the.
Best flow characteristics best design and operational features solid stellite 6 guided, nonspinning disc enclosed, dust and dirt protected stem lowest operational torque low maintenance cost simplest and fastest method of inline internal repairs. Work in a clean, free of dust, debris, and well lighted area. Improved maintenance practices which results in fewer maintenance related valve actuator failures, improved valve reliability and increased valve life. Pay particular attention to the gland to ensure there is no obvious wear or the valve is leaking. Trained and qualified maintenance personnel might recognize and correct such issues. However, certain aspects of installation and application can result in valve malfunctions.
Should the valve disc or seat become worn over time such that performance is not acceptable, the valve should be replaced. Installation, operation, and maintenance instructions. They have a slightly lower coefficient of flow than wyepattern globe valves. Ball valve troubleshooting guide spears true union, single entry and compact ball valves are designed and produced for troublefree operation and use. Maintenance scope performance check inspection major maintenance maintenance intervals 1 6 months after start up, once process is stabilized every 2 5 years or 250 000 cycles every 5 10 years or 750 000 cycles maintenance scope with required spare parts check valve opening and any abnormalties such as noise, vibration or cavitation.
Series 386 pressurereducing valve prv station victaulic. Angle pattern globe valves design is a modification of the basic tee pattern globe valve. In addition, improper valve application can result in mechanical damage from elevated temperature, backpressure, material incompatibility or incorrect pressure setting figure 1. Easy maintenance high cv unbalanced pressure rating class 150 to 600 equivalent metric ratings sizes 40mm to 150mm 1 12 to 6 travels 28. Installation, operation, and maintenance instructions cast. Nonc 1 valve normally open, 1 valve normally closed port p. Flow b to ab travels through ccenter of plug as ofpluga shown. Instructions for installation, operation and maintenance of. A strainer being installed before the valve will increase its reliability and proper working. Installation operation manual check and globe valves. Remove protective end caps, and inspect the valve ends for damages to avoid leakage before installation. On the other hand if you find its to difficult to replace then by all means go ahead and rebuild.
A valve driver must be installed for each valveactuator installed. Kvt s hifluidic forged and cast steel globe valves. The most common check valve is the disc type horizontal or vertical. These instructions are furnished for use in installation, operation and maintenance of cast iron bolted bonnetcap, wedge gate, globe and swing check valves. If you intend to repair or maintain the prv yourself sure to download the iom manual for the valve series to 8. Increased knowledge of valve design, construction, and function which in turn will improve workmanship, efficiency, and enhance the troubleshooting efforts.
The valve guard, poppets, springs and wear shims are conventional. Globe sprinkler 321547 4 grooved check valve globe model rcv swing check valves feature a swing type clapper designed for use in fire sprinkler or other types of water piping systems that incorporate grooved connecting pipe ends. When the valve is in the open position the disc is free to respond to the flow. Actuate the valve fullopen to fullclosed to check for possible damage from shipping and handling. If your motivated and have the room, my choice would be to replace the globe valve with the 14 turn ball valve. The evaluation of fluid forces on the stem is important for wear prediction of valve and actuator guidance parts.
Globe valves types, construction, applications and advantages. In normal service, no preventive maintenance is required for these valves. Maintenance a regular maintenance and inspection schedule will ensure you get the best life and operation out of your globe valve. The first law of physics, conservation of energy, has driven mankinds pursuit of progress since the dawn of time. Usually used in water pipework systems and installed immediately after the pump.
Nonc 1 valve normally open, 1 valve normally closed port p our policy is one of continued research and development. The location of the valve disk in relation to the valves seat, allows or restricts flow. All valves have a nonrestricted, 14 fnpt plugged boss in the downstream side of the body. Therefore, use a globetype valve that has the feature to control flow by opening the bypass valve. Make sure the valve is positioned such that there is sufficient space so that the hand wheel is easily and safely reached and there is enough clearance for the stem when the valve is open. At the moment of installation of the plant sudden and extreme change of pressure and temperature should be avoided. Installation problems often result in prv operational malfunction. Do not disassemble or modify a modentic valve in any way prior to installation.
Home commercial building controls valves and valve actuators globe valves globe valve rebuild kits. Instructions for installation, operation and maintenance. Components of the globe valve are similar to those of the gate valve. This specification shall be used in conjunction with the relevant project specifications and data sheets. Class 125 bronze globe valves screwin bonnet integral seat renewable seat disc 125 psi8.
Maintenance the pneumatic globe control valve does not need any preventative maintenance. Schuf ypattern stopcheck valves provide the same function as a yglobe valve, but also provide checkvalve protection in the event of backflow. The valve actuators are driven by solenoid drivers which, when activated, send high pressure air to the actuator to switch the valve. For electric or pneumatic valve operation, refer to the operation manual prepared by the manufacturers of relevant valve actuators. Unless the valve contains ptfe packing andor gasket, leave valves assembled and in the lightly closed position during installation, welding and postweld heat treatment. Globe valves are closingdown valves in which the closure member is moved squarely on and off the seat. Storage, protection, assembly, operation, disassembly and maintenance 5. Globe valve standard features sizes 12 4 used for effici ent throttling of flow positive shutoff displays excellent flow regulating characteristics throughout the entire lift of the disc all sizes rated for full vacuum service epdm seals. After welding completion, open the valve and flush the line to clean out any foreign matter. They are used in applications that have periods of pulsating flow.
A guide to types of valves introduction a valve is a device that regulates the flow of gases, liquids or loose materials through an aperture, such as a pipe, by opening, closing or obstructing a port or passageway. Valves doehdbk1018293 types of valves globe valves figure 9 zbody globe valve a globe valve is a linear motion valve used to stop, start, and regulate fluid flow. Instructions for trim set replacement plug and seat asahi america globe cont rol valves can be disassembled by using standard tools. Shihwakongdan 2ma808ho, 21698 jeongwangdong, siheungcity, gyeonggido, korea, republic of tel. As shown in figure 9, the globe valve disk can be totally removed from the flowpath or it can completely close the flowpath. Periodic checks should be performed to ensure proper operation and tightness of all fasteners. Model 5001 metric dimensions uses 1 hytrol main valve model 5001 dimensions in mm valve size mm 25 32 40 50 65 80 100 150 200 250 300 350 400 450 500 600 750 900 a threaded 184 184 184 238 279 318 aa 150 ansi 216 238 279 305 381 508 645 756 864 991 1051 1168 21 1562 1600 1848 aaa 300 ansi 229 254. Efforts to harness the power of wind, water and fire brought about huge advances in technology. This will prevent the valve seat from floating or warping during the process. Failure to follow these instructions could result in death or serious personal injury and property damage. Caution and warning to ensure safe and troublefree function and performance, please read all the contents of this manual before handling, transportation, mounting, operation and maintenance of valves. Measurement of the fluid flow load on a globe valve stem.
At, we take pride in offering a wide range of products and brands for both homeowners and professionals alike. Assemble the valve driver block the valve driver block accommodates up to four valve drivers. The valve seat on the other hand is made of two pieces. Relieve pressure from both sides of the check valve by venting the line. Globe valves contain a few moving parts such as the disk, the valve stem, and the hand wheel. Valves pressure relief valve maintenance plant services. Should this happen, reopen the valve to allow the process fluid to clear the. Valve description globe valves are used for flow regulation, frequent operation, increased flow resistance or for positive shutoff when closed. Globe valves ansi globe valves class 150 dimensions and weights nom size in 2 2 1. Easy maintenance quick change trim and top entry construction for easy inline maintenance valve assembly is easy and self guiding flow characteristics can be easily changed with interchangable trim parts nd9000 and ndx digital valve controller with online diagnostics enables performance follow up and predictive maintenance. The same level of care and caution is recommended in dealing with the maintenance of said valve, and there are steps that you could take if you want to make sure that your gate valve is functioning as best as it should, all the while ensuring that you are safe in the process. Installation, operation, and maintenance instructions forged.
Types n301, n310, n401, and n410 heavyduty ductile iron valves for either lpgas or nh 3 service. Schuf ypattern stopcheck valves provide the same function as a y globe valve, but also provide check valve protection in the event of backflow. It is threaded and fits into the threads on the valve bonnet. When flow reduces or reverses if the pump fails then the disc. Neither emerson, emerson automation solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product. Pneumatic globe control valve installation, operation and maintenance manual user information. For lpgas service, a hydrostatic relief valve type h124 or a vent valve can be installed in this outlet. Valve tag numbers and technical descriptions are included in appendices 1 to 5. Forged globe valve sharpe series 4483 forged globe valve temperature f 316l pressure psi 316 pressure psi carbon pressure psi20 to 100 1600 1920 1975 200 50 1655 1800 300 1210 1495 1750 400 1100 70 1690 500 1020 1275 1595 600 960 1205 1460 650 935 1185 1430 700 915 1150 1420 750 895 1 45 800 875 1105 1100 850 860 1080 900. Valve maintenance and manipulation during useshould be done only by experts and persons well trained for such purpose. By this mode of disc travel, the seat opening varies in direct proportion to the travel of the disc. Valve exercising and maintenance shall be performed in accordance with american water works. To prevent valve distortion, inefficient operation or early maintenance problems, support piping on each side of the valve. G2 2way valve g3 3way mixing valve g3d 3way diverting valve stem up open a to ab stem upup open b to ab stem upu open b to ab all valves shown stem down note.
For safety and comfort, do the repairs on a table with a vise. The ends of this globe valve are at an angle of 90 degrees, and fluid flow occurs with a single 90 degrees turn. Model 5001 metric dimensions uses 1 hytrol main valve model 5001 dimensions in mm valve size mm 25 32 40 50 65 80 100 150 200 250 300 350 400 450 500 600 750 900 a threaded 184 184 184 238 279 318 aa 150 ansi 216 238 279 305 381 508 645 756 864 991 1051 1168 21 1562 1600 1848. This type of valve has seats in a plane parallel or inclined to the line of flow. V60 v63, 32, 2 x 32, 52 or 53 solenoid and pilot actuated. This is particularly well achieved in the valve shown in figure 310. A valve controls system or process fluid flow and pressure by performing any of the following functions. Assemblymanual rev a november 14, 2004 page 2 of 8 table of contents pneumatic.
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