Wafer type check valve pdf

Ball check valves are used in spray devices, dispenser spigots, manual and other pumps, and refillable dispensing syringes. Valves shall be round body design with all oring seals. Model 90 wafer check valve on united brass works, inc. Milliken bf series wafer lug butterfly valve, sizes 2 through 48 212 230psi, 1448 150psi general valves shall be of the wafer or lug design for installation between ansi 125150 flanges. Wafer check valve 3 3 general instructions for transportation, unpacking and storage in suspending and supporting a valve, take enough care and do not stand under a suspended valve. Another type is the center guided lift silent check valve. Ansi class 2500 ansi class 300 ansi class 600 ansi class 900 ansi class 1500 check valve design features standard materials of construction ansi class 150 body type api 594 dual plate check. Wafer check operation and maintenance manual davis valve offers a wide range of double door wafer checks in cast iron, cast steel, stainless steel as well and steel and stainless alloys. The valve is not designed to handle any kind of impact. Read all the contents of this manual before piping and using them. The silent type check valve can be installed in either. Valves shall incorporate a single disc design suitable for either horizontal or vertical installations. Ritag wafer type check valves wafer type lift check valves sr, wafer type swing check valves zrk, dual plate check valves zrd for industrial.

Economical, lightweight, compact design significantly lighter and less expensive than comparable swing check valves. The lightweight compact design fits between mating flanges and meets api 594 facetoface dimensions. Smooth, spring assisted closing reduces water hammer. Keystone swing type wafer check valve figure 86 dimensions mm size dn a b pn10pn16 b1 b2 c d e q mass kg note dimension b is the outside diameter for iso pn 10pn 16 flange drilling. These valves are economical and available for large pipe sizes, 2 to 12 and larger. The tlw check valve tapped lug wafer was engineered for applications where exposed studs are not suitable. Browse fire protection products wafer check valves in the united brass works, inc. The difference between a lug and wafer butterfly valve. Component body stop pin hinge pin seat pin retainer gasket material cast iron astm a126 class b stainless steel aisi 416.

The company is licensed to offer products monogrammed api 600, api 6d, api 609 as well as valves with ce marking pressure. Duochek high performance nonslam check valves are the original mission wafer check valves introduced to the market in the late 50s. Series 240 wafer style check valve our industrial grade 304316 stainless steel swing check valve is designed for a flanged piping system, between two flanges. Dual plate wafer check valve lug type advantages of design with the aid of spring dual plate wafer check valve lug type, as wafer type, gives a maximum resistance with the minimum opening time. Full port wafer check valves offer some impressive advantages over other types of check valves. Valve type bore size pressure class bodybonnet body material trim material bal ball. Ritag type sr wafer type lift check valves these models have been installed in plants around the world for decades. Our elastomer hinge wafer check valve design takes performance to an entirely new level by eliminating the restrictive valve seat and substantially increasing the valves open area and flow coefficient cv. It is very popular in lowpressure liquid and gaseous services. We are in the manufacturing of wafer type non return valve with spring loaded and without spring both. Valtorcs 240 wafer check valves are designed to provide long service life if the velocity is kept within the flow rate shown in the table in attached pdf spec sheet and if a minimum of five pipe diameters of straight pipe in front of the valve is maintained downstream from a likely cause of turbulence i. Product description, dimensions and specifications pdf. The valve is lighter, smaller and therefore less expensive both to install and to maintain than conven onal check valve.

With more than wafer checks in stock for same day shipment, you should make davis valve your first call for all your wafer checks needs. All wafer check valves shall be of solid thermoplastic construction, having no metal that comes in contact with the media. Wafer type swing check valve wafer type swing check valve features. Types of check valves different check valves types of. Market segment commercial valves industrial valves severe ball valves. Wafer type check valve rsk standard plasticmetal version. Lug type valves are supplied with straightthrough bores according to api594. The body is made in one piece only, in cast iron with continued.

They are available in the sizes, pressure classes and configurations you need to meet the most demanding of applica. The valve is available in the sizes, pressure classes and configurations required to meet the most demanding of applications. Ask us how to spec the right check valve, or get catalogs, chemical resistance guides and submittals. Quality valve solutions made for the world catalog noleaderwck01 wafer type check valve wenzhou leader valve co. The valves are designed for simple flanged supported installation and will operate equally well in any position. Asahi av valves installation,operation and maintenance manual wafer check valve 5 10.

Asahi av valves installation,operation and maintenance manual wafer check valve 3 3 general instructions for transportation, unpacking and storage in suspending and supporting a valve, take enough care and do not stand under a suspended valve. The disc check valves are opened by the pressure of fluid and closed through compression spring as soon as flow stops thus preventing reverse flow. Service beyond the valve specifications may cause fluid leakage and valve malfunctions. This wafer type swing check valves are designed to be sandwiched between anges, reduced length dimensions and weights. Valve llc 812 oregon avenue suite e linthicum, md 21090 tel. The dual plate wafer check valve lug type covers the bolt along the entire length of the body. This manual applies to the manual operation of the kitz wafer type check valves. Ivc check valve with rubber oring seat and face sealing. Smooth disc surface improves flow efficiency and provide better sealing.

Swing check valves are armatures valves for return. The chemline wp series wafer check valve is a nonreturn valve ideal for limited space installations. Its design meets api 594 which is approximately one fourth the face to face dimension and 15% to 20% the weight, on most popular sizes, making them less expensive than a swing check valve. To ensure safe and troublefree function and performance, please read all the contents of this manual before handling, transportation, mounting and operation of the products. Some of the most common areas of application are hot water plants, plants for water and waste water treatment, boilers and supply systems, energy pipe systems and process equipment for the chemical and petrochemical industries. Swing check valves of type zrkzrkf are suitable for. Dimension b2 is the outside diameter for asme 150 flange drilling. In folding disc check valves, the disc consists of two halves attached in. The duochek wafer valve design is generally stronger, lighter, smaller, more efficient and less expensive than conventional swing check valves. They are available in various material of construction like cast iron, ductile iron, carbon steel, stainless steel, brass, and bronze. W72, shows an ansi class 150 dual plate wafer check valve for installation between ansi class 150 raised face flanges. Material 1 body 1 pvc 2 disc 1 pvc 3 stopper 1 pvc 4 shaft 1 pvc 5 shaft plug 1 pvc 6 av bolt 2 pvc 7 l bolt 1 ss400 8 spring 1 swpb wetfe coating 9 oring a 3 epdmfkm 10 oring b 1 epdmfkm 11 oring c 1 epdmfkm. Stainless steel disc and spring for excellent corrosion resistance. Specifyingkf check valves guarantees you a valve optimally designed for your application.

Hydrodynamic design ensures non slamming and water hammerless. A basic check valve consists of a valve body, bonnet or cover, and a disc which is attached to a hinge and swings away from the valve seat to allow fluid to flow in the forward direction, as in a swing or tiltingdisc check valve, and returns to valve seat when upstream flow is stopped. With a small face to face length and being wafer type, these dual plate check valves can be mounted directly between flanges and in accordance to many standard connections. Ss non return valve wafer type cs non return valve. Growth has been constant with the addition of an awwa butterfly valve, general service butterfly valve, swing check valve, rubber flapper check valve, double disc check valve, wafer outside spring check valve, globe style check valve and compact wafer check valve. In other words, the wafer version of butterfly valves was designed to hold a tight seal, safeguarding against bidirectional pressure differential in order to avoid any backflow in systems that have been. Valve to be installed between flanges using long bolts. Class, ff flange, cast iron body, 304 ss disc, bunan seats, 316 ss spring. Dpv api 594 dual plate wafer check valves delta pacific valve. All valves shall be capable of bidirectional, end of line, bubble tight service to rated pressure.

Keystone swing type wafer check valve figure 86 kv values standard spring light spring heavy spring size dn kv m3h zeta. The overall installation length is much shorter than a traditional combination of a wafer style check valve, butterfly valve, and spool piece. Add madao industrial zone, wuniu town, youngjia county. These in line check valves have springloaded discs which move along the pipe axis over a short distance to close automatically in a fraction of a second. Type general characteristics series 210 wafer type general applications shipbuilding, water works, heating and ventilation, power plants, oil refinery chemical plants etc.

Arita wafer check valve is designed and manufactured in conpliance to. Kf check valves are not intended for pulsating, reciprocating service except for the series 50 piston check valve. A ball check valve is a type of check valve in which the movable part is a spherical ball, as illustrated in figure 4. Find more detail about industrial valves from,download cast and forged steel ball valve,gate valve,check valve,globe valve pdf catalog,contact us quickly. Description product group 200 butterfly valves wafer type lug type double flanged type series 210 series 240 series 250 series 250 tripple eccentric double flanged type metal seated butterfly valve en 1092 din 2501, pn 6, pn 10, pn 16 bs 4504 pn 6, pn 10 iso 2084 pn 6, pn 10 ks jis, 5k, 10k, 16k semi lug type series 220 document revision. The butterfly valve can be operated with the check valve in an open or closed position with no interference in 2 thru 6 sizes. When a check valve is needed to prevent backflow, nibco has a complete lineup, including the nibco ring check with selfclosing disc, horizontal swing, sliding disc, silent check and y pattern. This valve is also referred to as doubledisc or split disc check valve. Stainless steel spring allows disc to close prior to reverse flow and is hidden in the diffuser under protection while valve in operation.

A wafer butterfly valve s function is to retain a seal to protect against dualdirectional pressure differential in the flow of fluid. It is manufactured in wafer body pattern and is available with soft or hard seats. They are available in the sizes, pressure classes and configurations you need to meet the most demanding of applications. The design of wafer design, sandwich type single disc spring. A traditional wafer check valve cannot be close coupled. Valves shall be wafer style conforming to asmeansi b16. Valve catalogue ball valve,gate valve,check valve,butterfly. Identifies the maximum operating pressure in psi and maximum operating temperature in fahrenheit. This manual will provide the owner of a wafer or globe style silent check valve the information to operate and maintain the valve to ensure a long and satisfactory operating life.

This nonslam springassisted, centerguided, lugged pattern wafer check valve is designed to prevent water hammer and reverse flow. Valve body with centering lugs for easy installation. The wafer check valve is most suited for water and sea water lines. Check valves types, construction, applications and. Easy structures and short dimensions are the remarkable features of zrkzrkfswing check valves. The various types of check valves are swing check, piston lift, ball type, dual plated, wafer type, tilting disc, etc. Wafer check dual flap tufskin 32 wafer check single flap long pattern slpsw series 3336 wafer check single flap lined long pattern do series 3738 wafer check superlite model 2024 3940 wafer check non slam axial disc model nsslsc 4142 wafer check threaded inline model rapscv 4344 non slam nozzle check valve 4548. Operation manual for kitz wafer type check valves 125 fwnb.

The valves may be installed in vertical or horizontal piping. Wafer flanged body double disc check valve sizes 8 48 asme body classes 150 900 bronze, nickel aluminum bronze, carbon steel, and 316 stainless steel style cw wafer silent check valve sizes 2 12 asme body classes 125 300 cast iron, carbon steel, and 316 stainless steel style cg globe silent check valve. Kf check valves 3 wafer style check valves series 10 flangeless swing style long pattern check valves with internal spring assist. Check valves are unidirectional valves, permit gases and liquids to flow in only one direction.

Wafer style series 888 the model 888 is a patented design constructed of an epoxy coated ductile iron or 316 stainless steel body. Ivc check valve with rubber oring seat and face sealing ivct check valve with ptfe seat and serrated contact faces 6. They are constructed to be mounted directly between. Component body stop pin hinge pin seat pin retainer gasket material cast iron astm a126 class b stainless steel aisi 416 stainless steel aisi 416 epdm. Hv066e2 wafer check valve contents 1 be sure to read the following description. Dual plate wafer check valve cast iron body, stainless steel plates to suit pn16 flanges pressure temperature fire protection centre a great deal to offer wrass pressure re mperature material list body disc seat hinge pin stop pin pin retainer spring washer gasket dimensions pn16 loacto cast iron stainless steel 304 epdm stainless steel 420. The silent type check valve is built with stainless trim to give years of trouble free operation. Pvc shall conform to astm d1784 cell classification 12454. Check valves types, construction, applications and advantages. Its lightweight compact construction makes it a preferable check valve when space and convenience are important. The single disc check valve wafer type disc check valve consists of four main components. Valves shall be round body design with all oring seals of either epdm or fkm and accept as an option an swpb etfe coated spring for use in vertical applications. All wafer check valves shall be of solid thermoplastic construction, having no metal that.