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CHINA J-VALVES Offers Various High-quality I ndustrial Ball Valves

J-VALVES, a distinguished professional ball valve manufacturer rooted in China, takes pride in its extensive product portfolio. Our offerings span a wide range, including trunnion-mounted ball valves, floating ball valves, high-temperature ball valves, high-pressure ball valves, metal-sealed ball valves, ultra-low temperature ball valves, DBB ball valves, Three-way And Four-way Ball Valve, and fully welded ball valves. Each product is a testament to our commitment to precision engineering and reliable performance. Meticulously crafted, they are designed to not only meet but exceed the most stringent industrial demands, ensuring stable operation even under extreme conditions. This enables us to provide our clients with high-value services and makes our valves widely sought-after in industries.

Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Double Block And Bleed Ball Valves
Size Range: 1/2″ to 48″ (DN15 to DN1200)
Pressure Rating: 150LB to 2500LB (PN20 to PN420)
Temperature Range: -46℃ to +200℃(it varies depending on the specific materialand working conditions)
Materials:
Valve Body: Forged Steel (e.g., ASTM A105), Stainless Steel (e.g., 304, 316), Alloy Steel
Valve Ball: Hardened Stainless Steel or Alloy Steel
Valve Stem: Stainless Steel or Alloy Steel
Sealing Material: PTFE, RPTFE, Metal Seat
Connection Type: Flanged Connection (RF), Butt Weld Connection (BW)
Operation Mode: Manual (Handwheel Operation), Pneumatic, Electric
Design Standards: API 6D, ASME B16.34
Testing Standard: API 598
End-to-End Dimensions: Compliant with ASME B16.10 Standard

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Ball valves

  • Floating Ball Design: The ball can float freely under the pressure of the medium and fits closely with the valve seat to form an excellent sealing effect, ensuring the reliability and durability of the valve.

  • Double Block and Bleed (DBB) Function: When the valve is closed, it can simultaneously block the medium flow at the upstream and downstream, and discharge the medium in the chamber through the middle bleed port, ensuring the safety and reliability of the system.

  • Flanged and Threaded Connections: Two connection methods, flanged connection and threaded connection, are available to ensure reliable installation and excellent sealing performance, facilitating seamless integration with existing pipeline systems.

  • Superior Sealing Performance: Equipped with high-performance elastic valve seats, it delivers outstanding bidirectional sealing performance, ensuring the valve maintains a tight seal under various operating conditions.

  • Fire-Safe Design: Compliant with API 607 standard, the valve can retain its sealing performance even in the event of a fire, preventing medium leakage.

  • Anti-Static Device: A built-in anti-static device effectively prevents static accumulation, reducing the risks of fire and explosion.

  • Stem Blowout Prevention Design: The valve stem adopts a blowout-proof design to ensure operational safety and prevent the stem from being blown out due to medium pressure.

  • Compact Design: The overall structure is compact, saving installation space, and is particularly suitable for mounting environments with limited space.

  • Multiple Operation Modes: Various operation modes including manual (handwheel operation), pneumatic and electric are offered to meet the requirements of different working conditions.

  • 1-3piece 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 AP1-607/6FA/IS0 10497

  • Springloaded seats

  • Sealant in jection on request

  • NACE MR-01-75

  • API Licenses:

    API6D

    API6DSS

    API6A-PSL4

  • Pressure Class:

    ASME 150-2500

    API 2000-15000

  • Service Type:

    Standard Temperature:-29℃ to 220℃/-20°F to 428°F

    Low Temperature:-46℃ to 150℃/-50°F to 302°F

    Cryogenic Temperature: -47℃ to -196℃/-52°F to-320°F

    Subsea(Shallow &Deep Water)

    Underground

    High Temperature:Above 220℃/428°F

Double Block And Bleed Ball Valves Features-seat Features
J-VALVES SPE can supply a range ofseat types and configurationsto meet specific process needs:

J-VALVES trunnion mounted ball valves standard seat ringsare soft-seated by the use of athermoplastic or elastomeric or Meta

Seats-Tungsten /Chrome carbide /ENP

6

Single Piston (SPE) , Double Piston effect (DPE) and Combination (SPE x DPE) seats are available.


7Seat 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.


The J-VALVES SPE trunnion mounted ball valves are available with Double

Block & Bleed in dependent oftheseat type.


Valve seating variations

Seat DesignSingle piston effect (SPE)Double piston effect(DPE)-DIB 1Combined DIB 2
Bi-directional
sealing		YesYesYes
Body-Cavity
Self relieving		YesNoYes
Double BarrierNoYesYes (preferred direction only)
8Single Piston Effect

Single piston effect (SPE) is the stand ard feature for theseat rings of the

J-VALVES SPE trunnion mounted ball valves.


On a SPE seat ring:

The pressure ac tingon the upstream side ofthe seat ringgenerates aforce which push theseattowards the ball.The pressure actingon the downstream side ofthe seatring generates a force which pull theseatring away fromthe ball.


Anyoverpressure which may be generated by the thermal expansion of the fluid trapped in thebodycavity with the ballin fully closed position, will beautomatically dischargedinthe line on the lower pressure side.


9Double 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.

10

Stem

  • The stem is independent from the ballandis not subject to theside load generated by the line pressure acting on the ball.

  • Two O-Rings and agraphite gasket grant a triple barrierand thefire safe sealing on the stem.

  • Abuilt instemsealant injectionsystemis provided as a standardfeature.

  • The standard antIblow-out eature ofthe stemis

    inaccrdance to API6D and is granted by the bodvcover. By removing the gland bushing the upper stem gasket can be replaced for

    maintenance with thevalve in service.

11

Ball

  • Inside entry valves 4" and smaller the ball is kept in position by an upper and alower trunnion,housed in the primary body.

  • Inside entry valves 6" and larger the ballis kept in position by an upper and alower trunnion, housed in two bearing blocks

  • Both the trunnions absorb the side load generated by the line pressureacting on the ball,without affecting the rotation of the stem

  • Large diameter trunnions minimize the torque required to operatethe valve.

  • The trunnion srotateinto metalbacked

    self-lubricating bearings.


12

Emergency Seat Injection

  • Emergency grease in jection fitting forseat rings are standard for6" and larger valves and as option on sizes 2"-4".

  • An eedle valve, complete with non return check valve is screwed in the bodyand connected to theseatrings.

  • The emergency sealantinjection can temporarily solve leakage problems, seatsshall be re paired at the first opportunity.

  • For valves smaller than 6" seat sealant in jection fitting can beprovided in the body cavity

13

Body Vent & Drain

  • All J-VALVES SPE TMBV are complete with ascrewed NPT Plug, located in thelower side of the body completedraining of the body cavity.

  • For valves up to size 4"the drain and vent are combined in oneport.

Double Block And Bleed Ball Valves Trunnion Mounted Features
14Double Block and Bleed

This feature permits to check the integrity of the seats without interfering withthe operation ofthe line andthe replacement of the upper stem seal with the valve inline. The body cavity can be drained and depressurized with the ball infully closed position, this feature which is available with all typeof seats(SPE,DPE or Combination) permits.


15

Extended Stem

Extended stem is supplied for Underground in stalla tion.

The stem seals arelocated inthe body Gland Plate.

The stem extension isnot affected by eventual stem seal failure.

16

Double Piston Effect

Extended bonnets are available for Cryogenic or high temperature service or special applications requiring this facility features.


18Low Emission Stem Sealing

J-VALVES SPE tandard stem sealing arrang ement offers Low Emission using a tri ple barrier arrangement certified to the latest lS0 15848 standard.

Anti-Blowout ProofStem

Stem is retained by the cover, the gland plate can beremovedwithvaweinfullyclosed position with the bodycavityvented toatmosphere. The upper stem Oring can be replaced formaintenance with valve in service

Anti-Static Device

All J-VALVES SPE Trunnion Mounted Ball Valves,areequippedwith an anti- static devicetoassurethetotalelectricalconductancebetween all metalparts of the valves.



19

Fire Safe

All J-VALVES complete range of Side entry,Top Entryand Welded body ball valves are certifiedfire safe according to AP1607/1S0 10497 - API6 FA.



20Valves Ends

Valves are available with:

Flan ged Ends (RF Or RTJ) tO ASME B16.5 0r ASME B16.47 Welding Ends to ASME B16.25Hub EndsCustomerspecific

Bore

Valve canbe supplied with Fullor Reducedbore in accordance with table lofAP| 6D,unless other wiserequired oradvised. Valveswith special Bore are available.

Face to Face/End to End

Dimensions are in accordance withAPI 6D and ASME B16.10.Specialdimensions areavailable.

Painting

Standard external painting is Sky Blue Ral5015,and systemis suitable to protect thevalve external suraceduringtransportationandstorage.Othertypesofpaintingareavailableon request.

Double Block And Bleed Ball Valves Trunnion Mounted Features
21Valve Transition Pieces

Transition pieces (pups), can be supplied forWeldingEnds Valwes to facilitate the welding ofthe valve totheline for:

Material compatibility.


Exces sive difference in strengthsand thickness betweenvalve closures and line pipe (limit is 1.5 times).


Avoiding damages to the valve soft seals.Important note: When transition pieces are supplied bythe customers, itisimperative to verifyif the strengthofthe same, suitable to undergothe hydro- test ofthevalve without damages ordeformations(1.5 times thevalve maximum rated pressure)



22Welded overlays,with Stainless Steel, Duplexand Inconel are available on request for:

All wetted parts

Body wetted parts

Seat ringshousing pocket

Stem sealingarea

Balls


Types of DBB Ball Valves Available

DBB Flanged Floating Ball Valve, DBB Flanged x Threaded Floating Ball Valve, DBB Threaded Floating Ball Valve, DBB Ferrule Ball Valve, DBB Cryogenic Ball Valve, DBB High-Pressure Ball Valve, Double Ball Ball Valve, Full Bore DBB Flanged Ball Valve, Reduced Bore DBB Flanged Ball Valve, SBB Ball Valve, SBB Flanged x Threaded Ball Valve, SBB Threaded Ball Valve, Double Block and Bleed Ball Valves

Ball valve types.pdf

J-VALVES Ball Valves Size Data Sheet.pdf

J-VALVES Ball Valves Size Data Sheet(1)J-VALVES Ball Valves Size Data Sheet(2)J-VALVES Ball Valves Size Data Sheet(3)J-VALVES Ball Valves Size Data Sheet(4)J-VALVES Ball Valves Size Data Sheet(5)J-VALVES Ball Valves Size Data Sheet(6)

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