Forged High Pressure Cryogenic Double Block and Bleed (DBB) Ball Valve - Full Bore, Dual Ball & Dual Phase Seal, Flanged Ends -Stainless Steel/Duplex Ss/Inconel

• Customization: Available
• Media: Water, Natural Gas, Oil and Some Corrosive Liquid
• Material: Stainless Steel/Duplex Steel/Aluminium Bronze/Nick
• Model NO.: JVALVES-Q41F
• Connection Form: Flanged FF/RF/Rtj, Bw Ends
• Driving Mode: Manual,Electric,Pneumatic
• Nominal Pressure: ANSI CLASS 150-900
• Channel: Straight Through Type
• Structure: Fixed Ball Valve
• Type: Dbb Ball Valve
• Function: Blow-Down Valve, Relief Valve, Atmospheric Valve, Bypass-Valve
• Temperature: Normal Temperature
• Standard: API 6D, API 608, BS 5351/DIN3357/JIS B2071
• Application: Atmospheric Valve
• Working Temperature: -29 Degree to 220 Degree
• Seat Material: Stainless Steel
• Nominal Diameter: 1/2"-48"(DN25-DN1200)
• Quality Warranty12 Month After Install: 12 Month After Install
• Delivery Term: EXW, Fob, Fca, CFR, CIF, etc.
• Working Pressure: 150lb/300lb/600lb/900lb/1500lb/2500lb
• Operated: Handle
• Testing Standard: API598
• Advantage: OEM/ODM
• Delivery Methods: by Sea, by Air, by Trian, by Express DHL/FedEx/Tn
• Transport Package: Exporting Plywood Case
• Trademark: J-VALVES
• Origin: China
• HS Code: 8481804090
• Production Capacity: 10000 Ton/Year
• Package Size: 50.00cm * 50.00cm * 50.00cm
• Package Gross Weight: 10.000kg

Product Description

Nominal Size	1/2″ to 48″ (DN15 to DN1200)
Pressure Rating	Class 150 to Class 2500 (PN20 to PN420)
Temperature Range	-29℃ to +425℃
Body Material	ASTM A182 F316L / F304L / F53 / Inconel 625 / Inconel 718 (forged integral body)
Body / Side Body	F316L / F53 / Inconel 625
Double Balls	F316L / F53 / Inconel 625 + ENP electroless nickel plating / STL Stellite alloy spraying
Stem	F316L / Inconel 718 / titanium alloy, high strength at low temperature
Seat	PCTFE (Kel-F) / RPTFE (low-temperature soft seal) + F316L with STL hardfacing (metal seal)
Packing	Pure PTFE V-rings / low-temperature grade graphite / Inconel wire-reinforced graphite
Bolts	ASTM A320 B8M (stainless steel) / Inconel 718 (high strength at high temperature)
Nuts	ASTM A194 8M / Inconel 718
Gaskets	Stainless steel spiral wound gasket (316L / flexible graphite) / metal ring joint gasket (RTJ) / pure silver gasket (cryogenic service)
Connection Type	Flanged (RF raised face / RTJ ring joint face), conforming to ASME B16.5 / EN 1092-1
Extended Stem Length	Calculated per BS 6364 / ISO 28921-1 according to valve size, insulation thickness and actuator position, typically 150–800 mm
Operation	Manual, pneumatic, electric (low-temperature type with heating and dehumidification), hydraulic
Design Standards	API 6D, API 608, ASME B16.34
Test Standards	API 6D, API 598

Features

1-3 piece body
Full andreduced bore
Trunnion mounted
Double block and bleed
Single or double piston effect design anti-blow out stem
Anti-static device
Firesafe to API-607/6FA/ISO 10497
Spring loaded seats
Sealant injection onrequest
NACE MR-01-75

Seat Princlple

Two independent seat rings grant the sealing, barrieragainst the line pressure actingon the upstream and downstreamsides of the valve which allows the valve tobe bidirectional.

A set ofcoil springs acting, between the upstream side ofeach seatring,andthe body,generate an uniform thrust on theseat which push the same against the ball and grant the sealingfeature with no orverylow pressureinthe line,when the line pressure increasethe thrust actingon theseat increases proportionally and the sealing leatureis granted throughout the fullpressure range.

Seat Design	Single piston effect (SPE)	Double piston effect(DPE)-DIB 1	Combined DIB 2
Bi-directional sealing	Yes	Yes	Yes
Body-Cavity Self relieving	Yes	No	Yes
Double Barrier	No	Yes	Yes (preferred direction only)

Single Piston Effect

Single piston effect (SPE) isthe standard feature for theseat rings of the AIMEIER VALVE Spatrunnion mounted ball valves.

OnaSPEseatring:
The pressure actingon the upstream side of the seat ring generates a force which push theseat towards the ball.The pressure acting on the downstream side of the seat ring generates a force which pull theseat ring away fromthe ball.

Any over pressure which may be generated by the thermal expansion of the fluid trapped in the body cavity with the ballin fully closed position, will be automatically dischargedin the line on the lower pressure side.

Double Piston Effect

Double piston effect(DPE) is a stand ard feature fortheseat rings ofthe J-VALVES trunnion mounted ball valves & recommended forwelded body valves. Ona DPE seat ring, both the pressure acting on the upstream sideof theseatring andthe pressure acting on thedownstreamside of the  seatring, generatea forcewhich push the seattowards the ball.

With th is type ofseat ring,the eventual over press ure whichmay be generated by the thermal expansion ofthe fluidtrappedinthebodyeavitywith theball in fullyclosed position,can be discharged by the use of:

An external safetyrelief device.

The Double Piston Effect grants a double sealingfeature,iftheupstreamseat ringisdamaged, thedown stream seatgrant the sealingfeature of the valve.

ball /gate /globe /check/triple offset butterfly /plug /strainer /other types customized valves

J-VALVES provide Industrial Valves, including ball valve, gate valve, globe valve, check valve, triple offset butterfly valve, plug valve,  strainer and other types customized valves, which use for pipeline and equipment connections. 
 
Our Products could produce in both casting and forging type to meet different applications. J-VALVES products could meet ISO9001, ISO45001, ISO14001, CE, ISO15848, API607  standards requirements. 

	Ball Valve	Gate Valve	Globe Valve	Check Valve	butterfly Valve	Strainer
Size ranging	1/2"~56"	1/2"~56"	1/2"~48"	1/2"~56"	2"~112"	1/2"~24"(Y type) 2"~48"(basket )
temperature	-29~+425ºC	-29~+425ºC	-29~+425ºC	-29~+425ºC	-29~+425ºC	-29~+425ºC
Pressure	150LB~2500LB	150LB~2500LB	150LB~2500LB	150LB~2500LB	150LB~900LB	150LB~1500LB(Y) 150LB~600LB(B)
Medium	Water, Oil, Gas, etc	Water, Oil, Gas, etc	Water, Oil, Gas, etc	Water, Oil, Gas, etc	Water, Oil, Gas, etc	Water, Oil, Gas, etc

Material of valve body/bonnet	specific materials
carbon steel	WCB,A105,A105N,LF2,LF3,WCC
austenitic stainless steel	CF8,CF8M,CF3,CF3M,F304,F316
duplex stainless steel	S32205,S32750,F51,F53,F55,CD4MCu
Chrome-molybdenum high-temperature alloy steel	WC5,WC6,C5,F11,F22,F5
cast iron	HT200,HT250,QT450
bronze	C95500,C95800,C63200
special alloy	F-2,Aloloy 20,Inconel 625

ZHEJIANG J-VALVES FLUID EQUIPMENT CO., LTD

Zhejiang J-VALVES Fluid Equipment Co., Ltd., founded in 2018 and headquartered in Wenzhou, Zhejiang Province, is an integrated manufacturing and trading company specializing in the export of industrial valves and pipeline fittings. The company holds certifications including ISO 9001, ISO 14001, ISO 45001, ISO15848, CE Marking (EU), and API 607 Fire Safe Certification, demonstrating its commitment to providing customers with safe, reliable, and competitive products, along with professional industry solutions and high-quality services.

J-VALVES main product lines include Ball Valves, Gate Valves, Globe Valves, Check Valves, Plug Valve, Triple offset butterfly valve and Strainers. These products are available in materials such as Carbon Steel, Stainless Steel, Duplex Steel, Super Stainless Steel, Alloy Steel, Bronze Alloy, Titanium Alloy, Copper Alloy, Monel Alloy, Nickel Alloy, and Hastelloy, catering to demanding applications in petroleum, architecture, metallurgy, chemical, electricity, and hydraulic industries.

1. Are you a trading company or factory? 
We are a manufacturer factory and we also have our own exporting license. 
 
2. Do you have certificate? 
Yes, ISO9001, ISO14001, ISO45001, API6D, API600, API602, CE, PED certificate. We also have some patents in design. 
 
3. How do you control the quality? 
In quality control, the most important is to avoid material mixing. 
In our factory, 3 spectro PMI machines are used in raw material warehouse, production plant, dispatch plant. 
Pressure inspecting machine, PMI machines, RA roughness spector, hardness testing machine...All machines help in inspection.4 staff inspect during production in different sections.5 staff inspect the finished productions to avoid shortage, poor quality, mixing chemical...
 
4. How big factories do you have?
We have total 25000 square meters in Wenzhou city & Lishui city, Zhejiang Province, China. 
 
5. If there is any quality problem, how do you solve it? 
We are very proud that we never make one customer leave us. We are not 100% perfect, there is some quality problem. 
Normally replacement, or compensation, or resend goods to customers as per the condition. To be discussed as per condition. 
 
6. How long is your delivery time? 
For normal products in 7-10 days; For bulk order, in 15-25 days. It depends. 
 
7. Warranty time? 
3 years warranty for all of our stainless steel products. Gaskets or the easy broken parts are not included due to the different application for customers. 
 
8. Why trust in us? 
14 years in this industry. It makes us professional. Good credit in this market. 
All of our machines are the assurance of our responsibility. 
 
9. Free sample? 
Free samples can be provided for first cooperation under sincere cooperation