Duplex Stainless Steel/Uns 31803/2205/A182 F51 Double Flanged Ball Valve

We always follow the principle of honesty and trustworthiness to promote our high-quality CN7M Gate Valve, Bolted Bonnet Forged Gate Valve, Carbon Steel Knife Gate Valve to the world. With our excellent administration, potent technical capability and strict top quality control technique, we go on to provide our consumers with trusted quality, reasonable price ranges and fantastic providers. Our company always adhere to the purpose of serving customers and grow together with customers under the newer and greater opportunities. Our company takes leading the development of the industry and pursuing quality as its bounden historical mission.

  NSV F51 Trunnion mounted ball valve is new high performance ball valves and It is suitable for long distance pipeline and general industrial pipeline. it is high cracking corrosion resistance to chloride environment,high corrosion resistance to dilute sulphuric acid and phosphoric acid,that suitable for Pulp and paper mills,chemical processes,and seawater service.

• Applicable Standard
   Design Standard: API 6D, ASME B16.34, BS 5351, API 608, MSS SP-72
   Face to Face: ASME B16.10, API 6D, EN 558
   End Flange: ASME B16.34, DIN 2501
   Buttwelding Ends: ASME B16.25
   Inspection and Test: API 598, API 6D
   

• Products Range
   Size: 2" ~ 48"(DN50 ~ DN1200)
   Rating: ANSI 150lb ~ 2500lb
   Body Materials: Duplex Stainless steel(A182 F51,A995 4A)
   Trim: Duplex Stainless steel(A182 F51,A995 4A)
   Operation: Lever, Gear, Electric, Pneumatic, Hydraulic actuators
   

• Design Features
   Full bore or reduced bore
   Trunnion mounted ball
   Cavity pressure self relief
   Fire safe design to API 607 / API 6FA
   Anti-static to BS 5351

STRUCTURAL FEATURES

1. Double Block And Bleed(DBB)
The seat adopts floating structure,through the action by the spring behind the seat,the seat can keep close contact with the ball,providing independent sealing of upstream and downstream media at low pressure differential.If the pressure in middle cavity is too high,either of them can conquer the pre-tightening force of spring and discharge,so as to relize the double block and bleed function.

2. Low Operating Torque
The trunnion pipeline ball valve adopts the trunnion ball structure and floating valve seat, so as to achieve lower torque under operating pressure. It uses self-lubricating PTFE and sliding bearing to reduce the friction coefficient to the lowest in conjunction with the high intensity and high fineness stem.

3. Fireproof Structure Design
In case of fire during the use of valve, the seat ring, stem O ring and middle flange O ring made of PTFE, rubber or other non-metal materials will be decomposed or damaged under high temperature. Under pressure of the medium the ball valve will push the seat retainer rapidly towards the ball to make the metal seal ring contact the ball and form the auxiliary metal to metal sealing structure, which can effectively control valve leakage. The fireproof structure design of trunnion pipeline ball valve conforms to requirements in API 607,API 6FA,BS 7655 and other standards.

4. Safety Relief Device
As the ball valve is designed with the advanced primary and secondary sealing that has double piston effect, and the middle cavity cannot realize automatic pressure relief, the safety relief valve must be installed on the body in order to prevent the danger of over-pressure damage inside the valve cavity that may occur due to thermal expansion of medium. The connection of the safety relief valve is generally NPT1/2. Another point to be noted is that the medium of the safety relief valve is directly discharged into the atmosphere. In case direct discharging into the atmosphere is not allowed, we suggest that the ball valve with a special structure of automatic pressure relief towards upper stream should be used. Refer to the following for details. Please indicate it in the order if you don not need the safety relief valve or if you would like to use the ball valve with the special structure of automatic pressure relief towards upper stream.

FAQ

1. Q:How can I get your company catalog?

A: For your reference, basic catalogue is same as " Download>E-Catalog” of homepage. If you need printed material or request more specific data like PQ material, please contact sales team.

2. Q:Does your company have any agent/distributor with the exception of China?

  A: At present,we have agent in Indonesia,Singapore,Canada,Mexico,Iraq,and welcome contact us if you would like to join us.

3. Q:Does “NSV” valves have supply to any value end user?

  A:Yes,,it just like PETROKIMIA GRESIK in Indonesia, BP Iraq,ESFAHAN MOBARAKEH STEEL In Iran etc.

4. Q: I want to be registered as your agency?

A: Defined inspection and manager’s approval shall be required for being registered as the company’s agency. For specific application method, please consult with sales team. If you are registered as the company’s agency, “Agency Certificate” will be issued.

5. Q:Are you manufacturer or trading company?

  A: We’re manufacturer,but our factory name is not named NSV due to we’re professional in promotion NSV brand with best service,and also have sold to many end user success.

With the business philosophy of 'customer-centric, market-oriented, and win-win for all three parties', we integrate resources and give full play to professional advantages with an open mind and a scientific and rigorous attitude to continuously promote the development of the Duplex Stainless Steel/Uns 31803/2205/A182 F51 Double Flanged Ball Valve industry. We are based on the domestic market, open up the foreign market, welcome customers from all over the world to bring our products. We adhere to the enterprise spirit of 'Integrity, Passion, Responsibility, and Integration', adhere to the business philosophy of 'Customer satisfaction is our eternal pursuit', and strive to achieve the dream of creating a legend with quality and creating a future with integrity!