Descrition:
Check valves are mechanical valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves. Fluid flow in the desired direction opens the valve, while backflow closes the valve. The mechanics of check valve operation are not complicated. Most check valves contain a ball that sits freely above the seat, which has only one through hole. The ball has a slightly larger diameter than that of the through hole. When the pressure behind the seat exceeds that above the ball, liquid is allowed to flow through the valve. Once the pressure above the ball exceeds the pressure below the seat, the ball returns to rest in the seat, forming a seal that prevents backflow. We manufacture check valves in conformity with ASME B16.34 standards. All valves are tested according to API 589 requirements. The marking is as per MSS SP-25 standards.

SIZE: 1/2"-36"

CLASS: 150LB-2500LB

Design and Manufacture: Cast steel check valve to BS 1868, ASME B 16.34 and API 6D; Forged steel check valve to API 602'

Inspection and Test: API 598 or API 6D

End flange dimension: ASME B 16.5(for NPS≤24); ASME B 16.47 series B, API 605 or ASME b 16.47 series A, MSS SP-44(for NPS bigger than 24)

BW end dimension: ASME B 16.25

Socket-weld dimension: ASME B 16.11

Face to face and end to end: ASME B16.10

Pressure-temperature ratings: ASME B 16.34

Wall thickness dimension: API 600 and BS 1868

Features:
1) Forged steel check valves conform to ASME B16.34
2) Each tested according to API 589, and marking is per MSS SP-25
3) Three bonnet designs
A) Bolted
B) Welded
C) Pressure seal
4) Three different design configurations
A) Piston check
B) Ball check
C) Swing check
5) Investment casting
6) Working pressure: 200 PSI WOG
7) Temperature range: -20 - 232° C
8) Materials: WCB, SS 316 and SS 304
9) Sizes: 1/4" - 4"
10) Threads: NPT, BSPT, BSP and DIN259/2999

Application

Main function of check valve is to prevent medium return in the pipeline system. The clamp check valve is suitable for kinds of pipeline as following conditions:PN1.0MPa~42.0MPa,Class150~2500,DN15~1200mm,NPS1/2~48,work temperature-196 ~540degree centigrade. Chose different material,products can be used in various medium-water,steam,oil,acid and alkali.
Specification

Swing Check Valve :

Competitive Advantage:

Competitive price, good quality

Forda is a professional manufacturer and agent of sealing material, gaskets, thermal insulation material,valves,pipe fittings,forged flanges and fasteners, as well as one station package supplier for most industrial piping materials. We have two production bases covering a total area around 33,600 m2 and more than 200 employees. Local sales offices locate in Ningbo, Cangzhou service station. Oversea agents in Saudi Arabia, Syria, Mexico South-East Asia (Malaysia), UK are helping us to sell our quality products worldwide. Our products are mainly used in Oil & Gas, Offshore platform, FPSO, Petrol Chemical, Long distance pipeline, Sea water treatment, Nuclear power industry and so on.

Through the years of rich experience, deep industrial knowledge background, good problem solving capability and constantly keeping abreast with the latest technology, Roc-Master has gained high reputation in the industrial field from both domestic and international markets.

Forda (Forda Piping Solutions Ltd.) is located in Yanshan heavy industry District, Cangzhou City, benefiting from Cangzhou’s perfect technology and raw material resource, economical and traffic circumstance, we have built up a professional commercial, engineering, management, service team and headquarter Cangzhou.

Forda has a total area of 3800m2, 100 staff including one chief heat treatment engineer, 16 senior or junior engineers, 70% staff in Shanghai are well educated at least junior college.  Here our production line is mainly for pipe fittings and flanges, including cutting, forging, CNC machining, thread rolling, heat treatment, NDE inspection, test lab, packing, and electric plating, etc.We are the first Chinese flange manufacturer who can provide design service. We use AutoCAD, Solidworks, Pro-E, ANSYS (F.E.A) software. We have made calculation as per ASME VIII & DNV-OS-F101 and FEA for swivel ring flange, anchor flange, barred tee, piggable WYE tee and many other pressure components with customers‘ approval.

We have 1 set of 4 ton electro hydraulic hammer together with manipulators, using this machine we can forge products maximum 4 ton in weight and 1.6m in diameter. 2 sets of 1 ton air hammer and 1 set of 750 kg air hammer, our annual forging capability is 5,000 ton. Every year we can provide 2,000 ton high property stud bolts and nuts with size up to 4 inch. The high corrosion resistance Sealand® series coating fasteners are around 40% of annual production.

In Cangzhou workshop we can machine and drill up to Φ100 inch, CNC machining & milling up to Φ48 inch. CNC cladding weld overlay together with piping spool prefabrication capability help us to make a total piping solution and be strong in high corrosion and sour service.

Through the years of rich experience, deep industrial knowledge background, good problem solving capability and constantly keeping abreast with the latest technology,Forda has gained high reputation in the industrial field from both domestic and international markets.

Forda is our production base. It covers an area of 30,000m2, with 20,000m2 workshops & offices inside. The traffic around is very convenient, about 40 min to airport, 10 min to train station, 20 min to national high way network by car.

We have two integrated production lines. One is for bolts and nuts, another is for sealing material, gaskets and heat insulation material. We have advanced large-scale machine tools for gaskets ,bolts and nuts, various braided machines for Gland packing, and a set of completed equipment for asbestos & non-asbestos joint sheets,our annual production capability is 5,000 ton. Every year we can provide 2,000 ton high property stud bolts and nuts with size up to 4 inch. The high corrosion resistance Sealand® series coating fasteners are around 40% of annual production.

Relying on advanced management system, superior testing instrument & facility and first-class technology and through the years of vast experience, in depth industrial knowledge, problem solving capability and constantly keeping abreast with the lasted technology. all our products are extensively applied in those industrial departments, such as petroleum, chemical industry, electric power, metallurgy, machinery, automobile, shipping building, pharmacy, aerospace industry, nuclear industry, etc. Our products cover more than ten countries and regions, such as Europe, Middle East,Southeast Asia, Africa etc ,and has gained industry recognition from domestic and international clients alike.

we guarantee product quality; Customers first, we satisfy customer demands" are the eternal faith of us. All Sealand staffs warmly welcome your visit at any time.