Ball Valves for Compressed Gas & CNG Systems
Class 2500 and Class 1500 CNG ball valves with PNGRB approval, IS 15901 compliant gate and ball valves for city gas distribution, and high-pressure compressed air/nitrogen valves for industrial CNG systems.
Which ball valves are used for compressed gas & cng systems?
Compressed Natural Gas (CNG) distribution and city gas distribution (CGD) networks in India operate under PNGRB (Petroleum and Natural Gas Regulatory Board) regulation - all valves on CGD networks must be PNGRB-approved type and comply with IS 15901 (Indian standard for natural gas valves). CNG stations serving vehicles operate at 200–250 bar, demanding Class 2500 (PN 420) forged steel ball valves with fire-safe and anti-static design. Vajra Industrial Solutions supplies PNGRB-approved CNG ball valves, IS 15901-compliant isolation valves for gas distribution mains, and high-pressure gate and ball valves for industrial compressed gas systems.
CNG Ball Valve (Class 2500)
CNG station dispenser isolation and cascade storage - 200–250 bar natural gas; fire-safe, anti-static, full-bore; PNGRB approved
Ball Valve (Industrial Compressed Air/N₂)
Compressed air systems (7–14 bar) and nitrogen bottles/manifolds (150–200 bar) - economy grade for inert gas
Critical Requirements
- PNGRB Type Approval - all valves used on City Gas Distribution networks in India require PNGRB approval; Vajra supplies PNGRB-approved CNG ball valves
- IS 15901 compliance - Indian Standard for natural gas valves covering material, design, testing, and marking requirements specific to gas distribution
- Fire-safe design per API 607 - mandatory for all CNG station valves in compressed gas service; metal seat backup prevents external fire leakage
- Anti-static design - mandatory for natural gas service; conductive path between ball/stem and body to prevent electrostatic sparking
- Fugitive emissions - ISO 15848-1 Class B or better for all valves on gas distribution mains; PNGRB requires zero-leak certification
- Full-bore design for metering bypass and pigging - all trunk main isolation valves on CGD networks must be full-bore per PNGRB network code
Service Challenges
- Natural gas at 200–250 bar (CNG station) - pressure well above standard pipeline; adiabatic compression heating on fast filling; fire-safe metal seat required
- Natural gas at 4–19 bar (CGD MRS outlet) - lean dry gas; minimal corrosion risk; fire-safe and anti-static design required by PNGRB
- City gas with odorant (mercaptan) - attacks NBR seats; PTFE preferred in gas service
- Compressed air (7–14 bar plant utility) - moisture and oil carry-over; standard WCB ball valves; filter/separator upstream recommended
- CO₂ (carbonated beverage industry, 60–80 bar) - dry CO₂ is not corrosive; SS316L ball valves for food-grade CO₂
Vajra Ball Valves
High-performance ball valves for reliable shut-off and control in various industrial applications.
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