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316L Bolt and Nut Universal Coupling
  • 316L Bolt and Nut Universal Coupling

316L Bolt and Nut Universal Coupling

Payment Type: L/C,T/T
Terms of Trade: FOB,CFR,CIF
Min. Order: 1 Piece/Pieces
Delivery Time: 45 Days

Basic Info

Model No.: UC01

Product Description

We are a leading manufacturer of water works valves and ductile iron pipe fittings, we have more than 15years experience in producing resilient seat gate valve, metal to metal seat gate valve, butterfly valve, non return valve of swing check valve / ball check valve, ,dismantling joint, universal coupling, flexible coupling, flange adapter, etc.


The product represents the latest mechanical coupling technology for connecting a variety of diameter pipes. The connect range can be from DN40 and DN2000. The customer has some special requirements of the product can also be designed and produced to meet Customer’s need. The simplicity and versatility of this product make them suitable for many applications including pumping stations, water purification plants, sewage treatment plants, plant rooms, instrument rooms, power generation equipment, gas stations and all pipelines.

Universal coupling is well suited for the installation of the flange pipe line, one end connecting the flange plate, the other end connecting socket pipe. Install easily and remove conveniently. Because of the large diameter of the pipe connected to the product, the line is allowed to have a±6ºdeviation when connecting the pipeline so that the normal movement of the pipe (such as ground subsidence, etc.). It can be used in the large bending radius pipeline caused the deviation. Product design and manufacture according to BS,EN,ISO,9001:2008 system and surface anti-corrosion material through the most stringent WRAS certification, so it can be used for drinking water.

Universal coupling coated with WRAS certified epoxy. For this anticorrosion coating, we provide excellent protection from transportation, storage, on-site and corrosion damage. We provide EPDM, NBR, SBR, nuts and bolts for carbon steel or stainless steel and long-term rust protection. Because this product can be connected to different pipe diameter of the pipeline, it can reduce the customer’s investment in the inventory.


Step 1.Check if the components of the product have been lost in transport and check for damage to the product surface.

Step 2. Clean the surface of the pipe spigot. The length is the half of the joint length.

Step 3. Check the product surface of the sealing ring and make sure that the surface is free of cracks and deformations which will interfere with the surface sealing effect of rubber ring.

Step 4.Draw an equal reference point on spigot end of pipe, which is half the length of the coupling joint, and calculate from the spigot end.

Step 5. Place a press pad at each pipe reference point.

Step 6. Apply the lubricant to the tube, The ramp is tilted toward the pipe end.

Step 7. Put the apron and robber on the tube, The ramp is toward the pipe end.

Step 8. Insert the middle sleeve into the pipe.

Step 9.The two connecting socket tubes should be parallel, axial alignment. When connecting, there is a gap of 5mm-10mm between the two socket pipes.

Step 10.Move the sleeve to ensure that the center of the sleeve is at the center of the spigot and socket pipe, and the distance between the two pipes is equal. The rubber ring is moved to the bell mouth of the sleeve.

Step 11.Move two end apron to the position of robber and align the bolt holes apron.

Step 12.Insert the bolt into the bore and tighten the bolt. The bolt shall be tightened alternately.

The nut shall be tightened according to the dimension of the bolt and the torque. After piping is pressurized, check if leakage caused by improper installation and settle it.


1. The bolt is not tight to meet the requirement torque.

2. A rock or fragment between a pipe and a gasket.

3. Dirt on bolts or nuts.

4. The distance between the spigot and the pipe is placed according to the requirement.

5. The two socket tubes are not parallel. Or not the same axis.

Thank you very much for choosing our water works valves and ductile iron pipe fittings! If you have any inquiries of our ductile iron pipe fittings such as ductile iron dismantling joint, PN16 GGG50 universal coupling, flexible coupling, or flange adapter, please don't hesitate to contact with us!

316l Bolt And Nut Universal Coupling


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Suzhou RSF Valve Co., Ltd is one of leading professional valves and valve parts manufacturing company from China. Our company is established in the year of 2010. RSF Valve is committed to provide our customers with professional one-stop valves and valve parts solution which include full range products, good quality control, competitive price, quick delivery and excellent after-sales service.

We have three main series of products which including Industry Valves, Ball Valve Parts, and Water Valves.

The first series of our products is Industry Valves which includes cast steel or forged steel Gate Valve, Globe Valve, Check Valve, Ball Valve, Butterfly Valve, Plug Valve, etc. Applicable standards of our Industry Valves include: basic design standards of API 600, API 6D, API 609, API 599, ASME B16.34, API 504, BS1873, BS1868, BS5351, EN593; Testing standards of API 598, API 6D, EN12266, API 607, API 6FA, etc. Cast steel material ranges: WCB, LCB, LCC, WC1, WC5, WC6, WC9, C5, C12 C12A, CF8, CF8M, CF3, CF3M, CF8C, 4A, 5A, etc. Forged steel material ranges: A105N, LF2, F11, F22, F304(L), F316(L), F321, F51, F53, F55, F61, etc. Pressure rating from Class 150 to Class 4500. Size ranges from 1/2" to 56".

The second series of our products is Ball Valve Parts which includes finish-machining forged steel ball valve bodies, closures (cover, bonnet), trunnion, shaft, support plate, ball valve seat ring, gland, adapter, and fittings (drain, vent, plug, tapon, greaser, injector, check valve). Main material includes ASTM A105, ASTM LF2, AISI/SAE4130/4140, ASTM A 182 F 316(L), F304(L),17-4PH(UNS S 17400), F44, F51,F53,F55,410,F6A, A694 F60 etc. As well as forging worshop, heattreatment workshop, we have our own welding workshop which enable us to provide cladding of valve bore to our customer, our WPS and PQR have been certified by TUV.

The third series of our products is Water Valves which includes Resilient Seat Gate Valve, Metal Seat Gate Valve, Non-Return Valve (Swing Check Valve, Dual Plate Check Valve, Nozzle Check Valve, Butterfly Tilting Disc Check Valve), Butterfly Valve, Globe Valve, Plug Valve, etc. Applicable standards, of our Water Works Valves include basic design standard of EN1171, DIN3352, DIN3202, BS5163, BS5153, EN593, AWWA C509, AWWA C515, AWWA C504, API 609, MSS SP, AS 2683.1, AS 2683.2; Testing standard of EN12266, API 598; Material ranges ductile iron GGG50, GGG40, EN-GJS 500-7. Pressure rating includes PN6, PN10, PN25, Class 125, Class 150. Size ranges from DN40 to DN3000 (1-1/2" to 120").

We are an exporting-oriented company. Around 90% our turnover is contributed from oversea market. Our main market is West Europe, America, Australia and Middle East area. Our valves have already been exported to more than 30 countries like USA, Canada, Brazil, Spain, Italy, Switzerland, Germany, France, UAE, Saudi, Iran, Australia, Russia, etc.

Our company has been certified by ISO9001:2015, ISO 14001, ISO 18001, CE/PED 2014/68/EU, WRAS, AD 20000-Merklatt W 0 and API 600, API 6D, API 20B, API 20C.

Our principle is Quality First, Customer First. In any of cases, you can always trust RSF VALVE with our name meaning- Reliable, Satisfied, and Friendship.

Company Info
  • Company Name: SUZHOU RSF VALVE CO.,LTD
  • Representative: Jack Zhang
  • Product/Service: API 6D Trunnion Mounted Ball Valve & Valve Parts , Floating Ball Valve Metal to Metal Ball Valve , Ball Valve Componnents Ball Valve Parts , EN593 Butterfly Valve Plug Valve Strainer , Resilient Seat Gate Valve Check Valve Globe Valve , BS5163 Metal Seat Gate Valve Ball Check Valve
  • Capital (Million US $): US$1Million
  • Year Established: 2010
  • Total Annual Sales Volume (Million US $): US$5 Million - US$10 Million
  • Export Percentage: 91% - 100%
  • Total Annual Purchase Volume (Million US $): US$5 Million - US$10 Million
  • No. of Production Lines: 3
  • No. of R&D Staff: 21 -30 People
  • No. of QC Staff: 21 -30 People
  • OEM Services Provided: yes
  • Factory Size (Sq.meters): 30,000-50,000 square meters
  • Factory Location: Dongchuang Hi-Teck Park, Mudu, Suzhou, Jiangsu, China
  • Contact Person: Mr. Jack Zhang
  • Tel: 86-512-66582398
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