Worm Gear Fully Welded Ball Valve (DN500, PN25) for Buried Heating Networks
Product Title:
Q367F-25C & Q61F-25C Fully Welded Ball Valves for District Heating Networks
Product Overview
LIKEVALVE manufactures a comprehensive range of fully welded ball valves specifically engineered for district heating and gas pipelines. Available in sizes from DN20 to DN1400, our valves feature a one-piece welded body design that guarantees zero external leakage, making them ideal for direct burial and high-temperature heating applications.
Product Range & Model Breakdown
Small Bore (DN20 - DN200): Q61F-25C
Features a floating ball design and compact one-piece forged body. Perfectly suited for residential heating branches, floor heating, and heat exchange station pipelines.
Large Bore (DN250 - DN1400): Q367F-25C
Features a trunnion-mounted (fixed) ball design with a worm gear operator. Designed for municipal main heating trunk lines and long-distance buried heating networks, ensuring high flow capacity and effortless operation.
Key Features & Advantages
Zero Leakage Fully Welded Body: Integrally forged and submerged arc welded without flange joints. Completely eliminates external leakage risks in underground buried environments.
High-Temp & High-Pressure Resistant: Rated at PN25, these valves safely handle municipal heating hot water up to 150°C. The reinforced PTFE seats ensure stable sealing during thermal cycling.
Full Port Design: Unrestricted flow path minimizes pressure drop and reduces heat loss in the heating network.
Heavy-Duty Anti-Corrosion Coating: Available in black (for buried) or white (for overhead) finishes. Applied with epoxy zinc-rich primer and polyurethane topcoat for over 30 years of service life in harsh soils.
Effortless Operation: Large bore models feature a worm gear reducer with a support bracket, allowing single-person operation even under high pressure.
Technical Specifications
| Parameter | Small Bore (Q61F-25C) | Large Bore (Q367F-25C) |
|---|---|---|
| Size Range | DN20 ~ DN200 | DN250 ~ DN1400 |
| Pressure Rating | PN25 | PN25 |
| Body Material | WCB Carbon Steel | WCB Carbon Steel |
| Seal Material | Reinforced PTFE | Reinforced PTFE |
| Operating Temp | -20°C ~ 150°C | -20°C ~ 150°C |
| Connection | Butt-Welded (BW) | Direct Burial Butt-Welded (BW) |
| Operator | Handle / Extended Stem | Worm Gear (Electric/Pneumatic Optional) |
| Typical Application | Overhead pipes, Station branches | Buried main lines, Heat stations |
Typical Applications
Municipal district heating main trunk lines (DN300+).
Residential floor heating and individual branch pipes (DN20-DN200).
Heat exchange stations and boiler room circulating water systems.
Industrial park heating distribution networks.
Direct-buried polyurethane insulated pipeline systems.
Why Choose LIKEVALVE?
With over a decade of expertise in heating and gas pipeline valves, LIKEVALVE operates a modern facility equipped with CNC machining and automated welding lines. We maintain extensive stock of standard sizes (DN20-DN1000) for rapid dispatch and offer comprehensive OEM/ODM customization, including extended stems, integrated insulation jackets, and electric/pneumatic actuators.
Every valve undergoes rigorous hydrostatic and pneumatic testing. We provide complete documentation, including material certificates, test reports, and third-party inspections, ensuring smooth project acceptance.
Procurement & After-Sales Support
Fast Delivery: Standard models (DN20-DN1000) ship immediately; customized models delivered within 15-20 days.
Customization: Extended stems, special anti-corrosion coatings, and insulated valve bodies are available upon request.
Warranty: 12-month warranty against manufacturing defects.
Documentation: Full compliance certificates and test records provided with every shipment.