4″ Gas Valve, Low Flow Resistance Fireproof Anti-static Gas Pipeline Shutoff Valve
4″ gas valve features low flow resistance, fireproof and anti-static structure, compliant with EN331 & API 607, for industrial thermal power and city gas main pipelines.
Description
The 4‑inch gas ball valve (NPS4/DN100) belongs to the medium‑to‑large bore industrial gas control valve family. It is extensively used in city gas distribution trunk lines, power plant inlet networks, and main supply headers for large industrial facilities—where high‑volume gas transmission is required. The valve combines a low flow resistance full bore design with an integrated fireproof and anti‑static structure, delivering both efficient conveyance and superior safety performance, making it a critical shutoff device in large‑scale gas systems.
The valve body features a straight‑through, full‑port flow passage with no internal restrictions or dead zones, resulting in minimal resistance to gas flow. This effectively lowers the pressure drop across the main pipeline, ensuring stable delivery under continuous, high‑capacity conditions—thereby improving transmission efficiency and reducing overall system energy consumption.
An anti‑static device is fitted as standard to rapidly dissipate electrostatic charges generated by high‑velocity gas friction, eliminating any risk of static‑induced ignition. The valve has also passed API 607 fire‑safe certification; in the event of an external fire, it reliably seals off gas release to prevent flame spread, making it suitable for high‑temperature, high‑pressure, and high‑risk industrial gas environments.
Basic Technical Specifications
| Parameter | Detail |
|---|---|
| Nominal size | NPS 4″ (DN100) |
| Pressure rating | Class150, PN16/PN25 |
| Standards | EN331, API 607, ISO 5208 (Class A tightness) |
| Body materials | WCB carbon steel, 304/316 stainless steel |
| Sealing materials | Gas‑compatible corrosion‑resistant RPTFE, NBR |
| Safety features | Anti‑static assembly, fire‑safe design, blowout‑proof stem |
| Suitable media | Natural gas, LPG, biogas, industrial fuel gas |
The valve employs a flanged end connection, which ensures robust joint integrity and excellent vibration resistance—well suited for buried outdoor installations or high‑temperature plant rooms. An ISO 5211 top mounting pad allows for later retrofitting of electric or pneumatic actuators, enabling remote intelligent control for smart gas grid upgrades. The gas‑specific sealing materials resist medium corrosion and aging, maintaining Class A zero‑leakage performance over extended service life.
This valve is widely adopted in thermal power plants, city gas gateway stations, and industrial park main gas pipelines. For example, the Düsseldorf Thermal Power Plant in Germany (Flughafenstrasse 85, 40474 Düsseldorf, Germany) has extensively installed the 4″ gas valve on its incoming gas network.
The low‑resistance full‑bore configuration reliably meets the plant’s high‑load, high‑flow boiler demand, while the fire‑proof and anti‑static safety features thoroughly mitigate risks of static discharge, leakage, or pipeline rupture during high‑pressure transmission—ensuring continuous, safe operation around the clock.
All products are subject to hydrostatic, pneumatic, fire‑resistance, and anti‑static tests prior to shipment, and hold CE and DVGW gas safety certifications. Customisation options include anti‑corrosion coatings, explosion‑proof enclosures, and intelligent control interfaces, fully meeting the procurement standards of major European and American gas engineering projects and energy stations.
