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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.

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0.5"300LB 2 Piece Cast Steel Floating Ball Valve

0.5"300LB 2 Piece Cast Steel Floating Ball Valve

Nominal Diameter: 0.5" (DN15)
Pressure Class: Class 300 (PN50)
Temperature Range: -29℃ to +425℃
Body / Bonnet: ASTM A216 WCB cast carbon steel
Ball: A105N / WCB with hard chrome plating, or 304 / 316 stainless steel (optional)
Stem: 410 / 420 stainless steel or 17-4PH precipitation hardening stainless steel
Seat: PTFE, RPTFE, PPL (reinforced PTFE)
Sealing Materials: PTFE / RPTFE / PPL (seat), flexible graphite or PTFE (stem packing)
End Connection: Flanged (RF Raised Face, conforming to ASME B16.5)
Operation: Lever (90° open/close, with optional locking hole)
Design Standards: ASME B16.34, API 608
Inspection & Test Standard: API 598
Face-to-Face Dimension: In accordance with ASME B16.10

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J-VALVES

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0.5"300LB 2 Piece Cast Steel Floating Ball Valve Structural Features

Cast Carbon Steel Construction: The valve body is made of cast carbon steel complying with ASTM A216 WCB. It features good castability, mechanical strength and pressure-bearing capacity with uniform structure, and offers moderate cost. It is suitable for general media such as water, oil and gas.
Two-Piece Design: The valve body consists of left and right sections with a compact structure, convenient for manufacturing, assembly, internal maintenance, seat replacement and overhaul, thus reducing downtime.
Floating Ball Design: The ball floats freely under medium pressure and fits tightly against the downstream seat to achieve reliable sealing. The sealing specific pressure increases automatically under medium and high pressure to ensure sealing performance, with a simple and dependable structure.
Full Bore Design (0.5"): The flow passage diameter matches the pipeline inner diameter (DN15), providing extremely low pressure drop to meet precise small-flow control requirements, ideal for instrument pipelines and sampling systems.
Flange Connection: RF (Raised Face) flanges are adopted in accordance with ASME B16.5 standard, Class 300 (PN50), ensuring reliable installation and sealing under medium and high-pressure conditions.
Fire-Safe Design: Complies with API 607 requirements. In the event of a fire, metal-to-metal contact maintains a certain level of sealing performance to prevent massive media leakage.

0.5"300LB 2 Piece Cast Steel Floating Ball Valve 3D Diagram

0.5"300LB 2 Piece Cast Steel Floating Ball Valve Product Features

2-3 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 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

0.5"300LB 2 Piece Cast Steel Floating Ball Valve 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

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

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.

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

Block & Bleed in dependent oftheseat type.

Valve seating variations

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) 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.

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.

0.5"300LB 2 Piece Cast Steel Floating Ball Valve Standard Features

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 API 6D and is granted by the bodvcover. By removing the gland bushing the upper stem gasket can be replaced for
maintenance with thevalve in service.

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.

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

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.

0.5"300LB 2 Piece Cast Steel Floating Ball Valve Trunnion Mounted Features

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.

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.

Double Piston Effect

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

0.5"300LB 2 Piece Cast Steel Floating Ball Valve Standard Features

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.

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.

Valves 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 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.

0.5"300LB 2 Piece Cast Steel Floating Ball Valve Trunnion Mounted Features

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)