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Buried Fully Welded Ball Valve
Buried Fully Welded Ball Valve
The CHINA J-VALVES Buried Fully Welded Ball Valve is a high-performance ball valve specifically designed for underground pipeline systems, widely used in fields such as oil, natural gas, chemical engineering, and urban gas. Its fully welded structure and unique design enable it to withstand high-pressure and high-temperature environments while providing excellent sealing performance and reliability. The valve can be directly buried underground without the need for large valve chambers, significantly saving installation costs and time.

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Buried Fully Welded Ball Valve

Structural Features

  • Fully Welded Structure: The valve body adopts a fully welded process, reducing the risk of external leakage and improving the overall strength and sealing performance of the valve.

  • Buried Design: The valve surface is protected with anti-corrosive asphalt coating or epoxy resin to adapt to underground service environments. It can be directly buried underground without the need for large valve chambers.

  • Multiple Connection Methods: Offers various connection methods such as flange connection and butt-weld connection to meet different engineering requirements.

  • Fire-Safe Design: Compliant with API 607 standards, the valve maintains sealing performance even in case of fire.

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

  • Emergency Seal Injection: Equipped with an emergency seal injection port for quick repair in case of leakage.

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

Technical Parameters

  • Size Range: 1/2″ to 60″ (DN15 to DN1500).

  • Pressure Class: 150LB to 2500LB (PN20 to PN420).

  • Temperature Range: -46℃ to +200℃.(specific range depends on sealing materials and working conditions)

  • Materials:

    • Valve Body: Carbon steel (A105), stainless steel (304/316), 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.

Application Scenarios

  • Oil and Gas Industry: Used in oil and gas field exploitation, gathering, and processing systems to ensure reliable isolation and control of media.

  • Urban Gas: Suitable for main lines and branch lines of urban gas.

  • Chemical Industry: Applicable to conveying and reaction systems of various chemical media.

  • HVAC: Used in cooling water systems, hot water systems, etc.

  • General Industrial Applications: Suitable for controlling and isolating media such as water, oil, and gas.

Advantages and Value

  • High Reliability: The fully welded structure and high-quality materials ensure stable operation of the valve under high-pressure and high-temperature environments.

  • High Safety: Fire-safe and anti-static designs, along with reliable sealing performance, effectively reduce leakage risks.

  • Easy Installation and Maintenance: The buried design simplifies the installation process and facilitates maintenance and repair.

  • Wide Applicability: Multiple material options and a broad range of pressure and temperature ranges enable it to adapt to various complex working conditions and medium characteristics.

Buried Fully Welded Ball Valve

Features

  • 1 piece body

  • Full and reduced bore

  • Trunnion mounted

  • Double blockand bleed

  • Single or double piston effect design anti-blow outstem

  • Anti-static device

  • Firesafe to AP1-607/6FA/1S0 10497 springloaded seats

  •  Sealant in jection

  • NACE MR-01-75


Technical Parameters

Size Range: 2″ to 60″ (DN50 to DN1500).

Pressure Class: 150LB to 2500LB (PN20 to PN420).

Temperature Range: -46℃ to +200℃.(specific range depends on sealing materials and working conditions)

Materials:

Valve Body: Carbon steel (A105), stainless steel (304/316), 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.


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-outfeature ofthe stem is inaccordancetoAPl6Dand is eranted bythebodycover.Byremovingthe glandbushing theupperstemgasket can bereplaced formaintenancewith thevalve in service.



Ball

  • Inside entry valves 4" and smaller the ball is keptin position byan upper and alower trunnion,housedin the primary body.

  • Inside entry valves 6" and larger the ballis kept in position by anupperand alowertrunnion housed in two bearing blocks.

  • Both the trunnions absorb the side load generated by the linepressureacting on the ball,without affecting therotationofthestem.

  • Largediametertrunnionsminimize the torque required to operatethe valve.

  • The trunnionsrotateinto metalbacked self-lubricating bearings.


Extended Stem

  • Extended stem is supplied for

    Underground installation.

  • The stem seals are located in the body Gland Plate.

  • The stem extension isnot affected by eventual stem seal failure.


Low Emlsslon Stem Sealing

J-VALVES SPA Standard stem sealing arrangement offers Low Emission usingatiple barrier arrangement certified to thelatest ISO 15848 standard.

Antl-Blowout Proof Stem

Stem is retained by the cover, thegland plate can beremoved with vave infuly closed postion with the body cavity vented to atmosphere.The upper stem O-ring can be replaced for maintenance with valve in service. 

Anti-Static Device

J-VALVES SPA Trunnion Mounted Ball Valves,are equipped with an anti-static device to assure the to talelectrical conductance between all metal parts ofthe valves.

Fire Safe

J-VALVES complete range of Side entry,Top Entry and Welded body ball valves are certified fire safeaccording to AP1 607/1SO 10497-API 6FA.


3D Drawing

全焊接球阀3D图
全焊接球阀3D分解图



Body,Ball,Seats& Stem Materials

Carbon Steel &Low Temperature Carbon Steel (Forged)

  • A105N, AISI 4140, AISI 4130, API 60K, API 65K, A350 LF2, A350 LF3.

    A350 LF6, A694 F52

  • A694F60, A694F65

Carbon Steel & Low Temperature Carbon Steel (Cast)

  • A216 WCB.A352 LCB.A352 LCC

Martensitic Stainless Steel(Forged)

  • A182F6A.A182F6NM

Austenitic Stainless Steel (Forged)

  • A182F304,A182F316,A182F316L.A316LN-Mod A182F321.

    A182F347.XM19(Nitronic 50)

PrecipitationHardeningStainless Steel (Forged)

  • 17.4PH(A705S17400)

Austenitic Stainless Steel (Cast)

  • A351CF8.A351CF8M.A351CF3M

SuperAustenitic Stainless Steel (Forged)

  • A182F44(6MO)

SuperausteniticStainlessSteel(Cast)

  • A351CK3MCUN

Duplex& Super Duplex (Forged)

  • A182 F51(S32205)A182 F53(S32750),A182F55(S32760)

Duplex&SuperDuplex(Cast)

  • A890-J92205,A8905A(A351CD4MCU)

Nickel Alloy (Forged)

  • Incoloy 800(B564-N0880), Incoloy 825(B564-N08825).

  • Inconel 600(B564-N06600), Inconel 625(B564-N006625)

Nickel Alloy(Cast)

  • Incoloy825(A494-CU5MCUC).Inconel600 (A94-CY40).

    Inconel625(A694-CW6MC)

Nickel-Copper Alloys(Forged)

Monel 400(B56-N04400), Monel 500(B564-N05500)

Nickel-Copper Alloys(Cast)

  • Monel400(A94-M35-1)

High Alloys (Forged)

  • HastelloyC(B564-N10276)


Bolts& Nuts Materials

CarbonSteel & LowTemperature Carbon Steel

  • ASTM A193 GR B7-A194 GR2H

  • A193 GR B7M-A194 GR 2HM(NACE)

  • ASTMA193 GRL7-A194 GR4,A193 GRL7-A194.GR7

  • ASTMA193 GRL7M-A194GR4M,A193 GRL7M-A194

    GR 7M (NACE)

Austenitic Stainless Steel

  • ASTMA320GR BB-A194 GR8

  • ASTMA320 GR B8M-A194 GR 8M

Duplex Stainless Steel

  • ASTM A453 GR 660


Corrosion inhibitors usually come in liquid form and can be mixed with cement. When using corrosion inhibitors, you need to add them at the specified dosage and strictly follow the relevant usage guidelines and safe operating procedures.

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The main functions of corrosion inhibitors

icon
Delay the setting time

Corrosion inhibitors can delay the setting time of cement, allowing it to have a longer working time in concrete construction. This is useful for large projects or where a long construction period is required.

icon2
Adjust the setting speed

Corrosion inhibitors can adjust the setting speed of cement to give it more stable performance under different temperature and humidity conditions. This helps improve the quality and strength of the concrete.

icon3
Increased fluidity

Corrosion inhibitors can improve the fluidity of cement slurries, making them easier to construct and pour. They reduce the viscosity of cement pastes and improve their fluidity and pumpability.

icon4
Control Shrinkage and Cracks

Corrosion inhibitors can reduce the shrinkage and occurrence of cracks in cement. They improve the volumetric stability of cement and reduce stress concentrations and damage in concrete structures.

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