Direct Buried Ball Valve DN70–DN1200 for Natural Gas & Heating Pipelines

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Direct Buried Ball Valve DN70–DN1200 for Natural Gas & Heating Pipelines

Our Direct Buried Ball Valve is engineered for underground installation in natural gas, city gas, and heating pipeline networks. With a rugged cast steel body and anti-corrosion coating, it provides long-term durability in harsh soil and groundwater environments. Featuring double block and bleed, emergency sealing, and fire-safe structures, it ensures safe and reliable operation. The extended stem design allows operation and maintenance at ground level without excavation. Its low-torque, floating ball structure delivers smooth actuation and tight sealing, making it ideal for long-distance transmission and distribution systems.

Quantity:
Material:	Carbon Steel Stainless Steel Cast Steel
pressure:	PN16-PN100
Size:	DN50-DN700
Availability:





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Structure Characteristics

Technician Parameter

Physical Photo

Company Description

Anti-static design	It is dangerous to transfer inflammable and explosive medium because of the static generated by the friction between metal and plastic or rubber, Therefore, to the metal parts isolated by plastic or rubber seals,stainless stell spring is used to meet the criterion of BS 5351.
Low Operating Torque	The body of Underground Type Ball Valve is of floating ball or trunnion ball whose surface is handled with grinding polishing and harding,separated with stem. Stem is of slender shaft with its surface handled with harding. Its plastic bearings lined with stainless steel is equipped on 0D. Bearing height should be above the stem diameter. Therefore, it is with small wearout radius and low operating torque.
Reliable Seal	Ball valve adopts double seal structure. The seal of trunnion mounted ball valve seat is realized via both flexible seal and metallic seal.Backstop ring is axial floating and underpressure seal of seat is realized via spring prepressing. And it is well designed to automatic high duty seal realized by medium pressure with plunger effect to cut off medium.External diameter of backstop ring is equipped with 0-ring to achieve the seal with body.Expanding graphite annulus is designed to realize the seal under the condition of fire.
Urgent Seal	Stem/gland part and flank body and seat bearing part are both equipped with grease hole and grease valve.If stem and/or seat are/is damaged and cause leak, stop-leak compound is used to realize second seal. Each grease valve is equipped with a concealed check valve to prohibit stop-leak compound overflow under the effect of medium. Joint jointed quickly by grease gun is in the bottom of grease valve.
DBB	For stationary type Underground Type Ball Valve, Body cavity medium can be drained through pollution discharging and emptying plants when body is in the wide open or full-close position. At the same time,the excessive pressure in valve cavity can be drained to low-tension position by self-relief seat.
Vent Valves	An emptying hole is put in the body which can be equipped with emptying valve after testing body pressure. Body cavity can be emptied and cleaned during valve is working. The body valve with DN≥200mm is equipped with two bleeders in the upper and lower connectors, which can drain the air left in the pipeline.
Fire Protection Design	It is tested that the body design is up to the standards of API 6FA/API 607.And pass fire resistance test.
Anti-Static Design	It is dangerous to transfer inflammable and explosive medium because of the static generated by the friction between metal and plastic or rubber. Therefore, to the metal parts isolated by plastic or rubber seals, stainless stell spring is used to meet the criterion of BS 5351.
Material Selected	The selection of valve part material conforms to the requirements in regulations of API 6D,ASTM,ASME,GB,JB and etc. Different methods are used for surface treatment of the parts depending upon different work conditions.If antisulfureted hydrogen stress corrosion is required, the treatment will be done according to the requirement of NACE MR 01-75.
Extension Stem and Induction pipe	It is easier to operate to extend stem and extend corresponding grease pollution discharge to the top of valve.
Various Operation Modes	Terminal area between valve and driver meets the criterion of IS0 5211 so as to connect and interchange among different drivers. Manually operation,electric-driven,air-driven and air-hydraulic driven are in common use.

Valve Dimension List

Underground Ball Valve

External Anti-Corrosive Treatment

Underground Ball Valve

Antiseptics Table Of Standard Performance

STAC Petrolatum Anti-Corrosive Tape Performance

STAC Paint Filler Product Performance

STAC Paint Base

STAC External Protective Tape Pertormance

The company is integrated fully welded ball valve products for the trunk. Using the most advanced techniques and technologies.adopting international quality to assure and control procedures.

Underground Welded Ball Valve

Fuchen Intelligent Equipment Co., Ltd. is located in Hangzhou, China, which has convenient transportation and beautiful environment.Wehave our own R & D and sales team. After years of solid exploration and precipitation from theory to practical application, our company has completed accurate research on the steam valve and equipment market, in-depth understanding of company product needs, digestion and absorption of steam valve design and manufacturing conceptsand established the long-term positioning of brand steam valves. Our company have only one goal: to carry for.ward the spirit of craftsmanship and produce excellent steam valves and equipment.

Factory Showcase

With the spirit of excellence and craftsmanship, we have won high praise from customerswith good services, excellent products, fast delivery, and competitive prices. The productsare exported to the United States, South America, Europe, South Africa, South Asia, andso on. We also welcome O E M and O D M orders. If you are interested in our steamvalves and equipment products, please feel free to contact us at any time.

Factory Equipment

FAQs

Who we are?

Fuchen Intelligent Equipment (Hangzhou) Co., Ltd is a trusted provider of high-quality valves and freeze-dryers. With a commitment to excellence, we cater to diverse industries, offering a comprehensive range of products that meet the highest industry standards.
Are you trading company or factory?

We are factory with trading company.
Why should we choose your company over others?

1. Our team of experts carefully evaluates and tests each product to guarantee its quality, functionality, and longevity.
2. With years of experience in the valves and freeze dryer industry, our team possesses in-depth knowledge and expertise. We understand the unique challenges and requirements of various sectors, and we leverage our industry insights to provide tailored solutions.
3.We understand the importance of timely delivery and efficient service. Our streamlined processes and reliable logistics network enable us to fulfill orders promptly, ensuring that your operations remain uninterrupted.
4.We understand the importance of timely delivery and efficient service. Our streamlined processes and reliable logistics network enable us to fulfill orders promptly, ensuring that your operations remain uninterrupted.
Do you provide samples? Is it free?

Yes, we could offer the sample. Considering the high value of our products, the sample is not free, but we will give you our best price including shipping cost.
Can you provide customized services？

We can customize different colors, LOGO and so on according to customer's requirements.
What’s the MOQ for each item?

If we have enough stock for the items,we can accept the quantity as customer’s request,if not,different items have different MOQ.
Do you test all your goods before delivery?

Yes,we have test equipment and team,and we test all products before shipment.