Like Valve Q361F-25C Extended Stem Turbine Fully Welded Ball Valve DN150 DN200 Buried Chamber High-Temperature Steam Natural Gas Welding Valve

1. Like Valve Q361F-25C Extended Stem Turbine Fully Welded Ball Valve DN150 DN200 Buried Chamber High-Temperature Steam Natural Gas Welding Valve

1. Image 1 | Yellow Double Vent Extended Stem Q361F-40 Ball Valve DN200 A105 Material (Gas Dedicated)
Overall A105 forged steel valve body, extended lifting stem + dual-side integrated vent and drain pipelines, turbine handwheel drive; designed specifically for deeply buried natural gas valve chambers, enabling one-step maintenance pressure relief and pipeline purging. Features a yellow gas-dedicated anti-corrosion coating, suitable for sub-high pressure gas direct-buried pipelines.

2. Image 2 | Blue Standard Extended Stem Q361F-25C DN150 (Basic Heating Model)
Integrated carbon steel WCB fully welded valve body, standard extended stem, turbine three-spoke handwheel; simple structure without auxiliary pipelines, suitable for residential heating and high-temperature hot water buried pipelines, can be directly wrapped with polyurethane insulation for direct burial.

3. Image 3 | DN150 Extended Stem Turbine Fully Welded Ball Valve PN25 Heating Model
The extended stem is integrally formed without splicing, and the stem packing is highly resistant to high temperatures without leakage; full bore flow path, it is a mainstream specification for municipal heating branch lines and buried heat exchange station chambers, with regular stock available in the workshop.

4. Image 4 | DN200 Extended Stem Q361F-25C Heating Ball Valve
The extended stem length can be customized as needed. Large diameter thickened forged valve body, large-size turbine handwheel, easy to open and close by one person; suitable for deep soil covering and buried main heating pipelines in valve chambers.

5. Image 5 | Large Diameter Extended Stem Double Vent Gas Complete Set Ball Valve
Extended stem + full set of pressure measurement, vent, and drain auxiliary valves integrated, fixed ball high-pressure structure; suitable for long-distance natural gas gate stations and park gas buried networks, can be equipped with pneumatic actuators for remote control.

II. Model Interpretation: Q361F-25C Extended Stem Fully Welded Ball Valve
Q: Ball Valve

3: Worm gear manual drive (can be changed to electric/pneumatic)

6: Butt weld (BW) connection at both ends (suitable for seamless connection with insulated steel pipes)

1: Floating straight-through ball (small/medium diameter); large diameter upgrades to Type 7 fixed ball

F: Reinforced PTFE fluoroplastic soft seal (high temperature resistant, resistant to gas impurities)

25: Nominal pressure PN25; PN40 can be customized for gas conditions

C: Valve body material WCB carbon steel; A105 forged steel upgrade for high-pressure gas models

Core Feature: Extended operation stem. The stem length can be customized according to the soil covering depth of the valve chamber, allowing ground-level opening/closing without entering the pit for deeply buried valves.
Regular Diameters: DN100, DN150, DN200, DN250, DN300; DN400-DN1200 large diameters support customized extended stems.

III. Core Product Advantages (Exclusive selling points for buried chambers, universal for heating + gas conditions)

1. Customizable Extended Stem, Perfectly Fits Buried Valve Chambers
The stem is integrally forged and lengthened without splicing leakage points; the length can be customized from 500mm to 3000mm according to soil depth. Ground-level turbine operation eliminates the need for personnel to enter the pit, making maintenance safe and convenient, solving the problem of operating deeply buried pipeline valves.

2. Integrated Fully Welded Body, Long-term Zero Leakage Underground
The valve body is integrally forged and formed by automatic submerged arc welding of circumferential seams, with no flange gaps. The outer wall has multi-layer anti-corrosion coating, with optional heating blue / gas yellow dual coatings. It can be wrapped with polyurethane insulation for direct burial, ensuring 30 years of maintenance-free and leak-proof performance in acidic, alkaline, and humid soil environments.

3. Universal for Heating and Natural Gas, Resistant to High Temperatures and Media Corrosion
Heating Condition PN25: Suitable for -20℃~150℃ high-temperature heating hot water and low-pressure steam. The valve seat uses high-temperature resistant PTFE sealing, resistant to scale scouring.
Gas Condition PN40 (A105 Forged Steel Upgrade): Suitable for -40℃~80℃ natural gas and coalbed methane. The double vent structure meets gas safety maintenance regulations.

4. Turbine Reduction for Labor-Saving Operation, Easy to Open/Close Large Diameters
Equipped with a worm gear reduction mechanism, the extended stem transmission is stable without jamming. DN200 and above large diameters can be switched with a single handwheel. Supports adding electric/pneumatic actuators, suitable for remote control of automated heating stations and gas gate stations.

5. Two Structures Available: Standard Extended Stem / Double Vent Extended Stem
Heating Pipelines: Use the standard extended stem without vents for lower cost, meeting heating shut-off needs.
Gas Pipelines: Use the double-side double-vent extended stem, integrating vent, drain, and pressure measurement pipelines, complying with gas company acceptance regulations, making pipeline sectional pressure relief and purging safer.

6. Full Process Factory Testing, Complete Bidding Qualifications
Every valve undergoes dual testing of hydrostatic strength and airtightness. A105 forged steel models can provide material spectral analysis reports, special equipment qualifications, factory certificates, and pressure test records. Complete bidding documents for heating and gas general contracting projects are available.

IV. Technical Parameter Comparison Table

V. Applicable Industry Scenarios

Heating Scenarios (Blue Extended Stem Model)

·City central heating buried valve chambers, long-distance heating buried insulated pipelines.

·Residential floor heating, heat exchange stations, boiler room underground soil-covered pipeline shut-off valves.

·Old heating network renovation, extended operation valves for deep soil-covered pipelines.

Natural Gas Scenarios (Yellow Double Vent Extended Stem Model)

·Municipal sub-high pressure natural gas buried direct-buried networks, park gas transmission pipelines.
·Gas pressure regulating stations, distribution station buried chamber shut-off valves.
·Coalbed methane, industrial gas buried pipelines with integrated vent and drain ball valves.

VI. Like Valve Manufacturer Strength
Like Valve has focused on the customized production of extended stem fully welded ball valves for over ten years, possessing a complete production line including forging, CNC extended stem processing, automatic welding, and airtight pressure testing. Standard extended stems DN100-DN300 are in stock and shipped the same day. Extra-long stems and large diameter double vent models support 7-15 day customized production scheduling.

Customization Services:
·Arbitrary customization of extended stem length to fit valve chambers with different soil depths.
·On-demand production of two structures: standard heating model and gas double vent model.
·Complete assembly of electric and explosion-proof pneumatic actuators, with remote signal feedback.
·Prefabricated polyurethane insulated integrated valve body, one-stop solution for buried pipelines.
·Third-party material testing, nitrogen airtight pressure testing certification, and complete bidding qualification documents.

VII. Purchase and After-sales Guarantee

·Stock specifications DN100-DN300 are shipped on the day of payment; extended non-standard customized models are delivered within 3-15 days.
·18-month whole machine warranty. Double pressure tested qualified at the factory. Free replacement of parts for non-media corrosion and non-man-made damage quality issues.
·Technical engineers provide one-on-one selection based on well depth and medium, and offer free extended stem length design schemes.
·Tiered discounts for bulk purchases in heating and gas projects, and stable long-term distributor cooperation rebates.
·Heating companies, gas general contractors, and valve distributors are welcome to visit the factory for inspection and sampling pressure tests.

Bottom Conversion Call-to-Action
For extended stem ball valves dedicated to buried chambers, choose Like Q361F-25C Extended Stem Turbine Fully Welded Ball Valve. Covering both heating and natural gas conditions, with customizable stem lengths, standard stock available, and fast customization for non-standards. Free condition-based selection and quotation. Welcome engineering procurement inquiries!