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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.

Pipeline Fully Welded Ball Valve
Pipeline Fully Welded Ball Valve
Size Range: 2″ to 60″ (DN50 to DN1500).
Pressure Class: 150LB to 2500LB (PN20 to PN420).
Temperature Range: -46℃ to +180℃.(specific range depends on sealing materials and working conditions)
Materials:
Valve Body: Carbon steel (A105), alloy steel
Ball: Stainless steel.
Stem: Stainless steel.
Sealing Material: PTFE, RPTFE, metal seal.
Connection Type: Flange connection (ASME B16.5/ASME B16.47), butt-weld connection (ASME B16.25)
Design Standards: API 6D
Testing Standards: API 598
Applicable Media: Oil, natural gas, water, steam, chemical media.

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Product Introduction

  • Fully Welded Structure: The valve body is manufactured using a full welding process, eliminating the risk of external leakage and enhancing the overall strength and sealing performance of the valve.

  • Extension Rod Design: Equipped with an extension rod assembly, it enables convenient operation when the valve is installed underground, without the need for extra valve chambers, thus saving installation costs and time.

  • Fire-Safe Design: Complies with the API 607 standard, maintaining sealing performance even in case of fire to prevent medium leakage and ensure system safety.

  • Anti-Static Device: Built-in anti-static device effectively prevents static accumulation, reducing the risk of fire and explosion, and is particularly suitable for controlling flammable and explosive media.

  • Emergency Seal Injection: Equipped with an emergency seal injection port, allowing quick repair in case of leakage to ensure the valve's reliability and safety.

  • Multiple Operation Modes: Can be equipped with manual, pneumatic, electric, or hydraulic actuators to achieve remote and automated control.

  • Compact Design: Small in size and light in weight, it is easy to install and integrate into existing systems, saving space.

3D diagram


2


1Weldingsteel pipe16Bolt31ThrustWasher
2Seamless steel tube17"O"-Ring32"O"-Ring
3Right Body18"O"-Ring33Packing Box
4Spring19Seal Ring34Gasket
5"O"-Ring20Extension Stem35"O"-Ring
6"O"-Ring21Bearing36Stem Bearing
7Thrust Washer22Extension Support37Four Open Loop
8Packing23Pin38Sealing Ring
9Seat Retainer24Support Frame39ThrustWasher
10Seat25Key40Stem Bearing
11Seat26Connection Plate41Stem
12Ball27Stud42Stem Bearing
13Trunnion Support28Nut43Body
14Worm-Gear29Bolt44Thrust Bearing
15Key30Packing45Stem Bearing


Product Features

  • 1 piece body

  • Full and reduced bore

  • Trunnion mounted

  • Double block and bleed

  • Single ordouble piston effect design anti-blow out stem

  • Anti-static device

  • Firesafe to API-607/6FA/ISO 10497

  • Springloaded seats

  • Sealantinjection on request

  • NACE MR-01-75


Trunnion Mounted Features-seat Features
J-VALVESSPE 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

SeatDesignSingle 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)

8

Single 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.


9

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.


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.



Trunnion Mounted Features


14

Double 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.


17

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.


18

Low 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.

20

Valves Ends

Valves are available with:

Flan ged Ends (RFOr RTJ) tO ASME B16.5 0rASME 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 withAP| 6Dand ASME B16.10.Specialdimensions areavailable.


Painting

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


Trunnion Mounted Features

21

Valve 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)


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

All wetted parts

Body wetted parts

Seat ringshousing pocket

Stem sealingarea

Balls

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