Ingersoll-Rand 93198554 Atmospheric Valve for Air Compressors

An Atmospheric Valve (also called a breather valve or vacuum relief valve) is a safety device designed to regulate pressure in storage tanks by allowing air inflow/outflow to maintain equilibrium with atmospheric pressure. It prevents tank damage from overpressure (during filling) or vacuum (during emptying).

• Dual-Action Protection - Combines pressure relief + vacuum relief in one unit
• Prevents Tank Collapse/Explosion - Maintains safe ±0.2-1.0 PSI range
• Weather-Resistant - Stainless steel or aluminum construction with rain hood
• Fire-Safe Design - Fusible ring melts to allow emergency venting (API 2000 compliant)
• Low Maintenance - No moving parts, self-cleaning mesh filter

• Set Pressure Range: 0.1-5 PSI (adjustable)
• Connection Size: 1" to 8" NPT/Flange (ANSI/DIN standards)
• Temperature Range: -40°C to +200°C (high-temp models available)
• Flow Capacity: 10-10,000 m³/h (depends on valve size)
• Certifications: API 2000, ISO 28300, ATEX, PED

• Oil & Gas: Crude oil storage tanks, LNG terminals
• Chemical Industry: Solvent/acid storage vessels
• Food/Beverage: Edible oil tanks, fermentation containers
• Agriculture: Grain silos, fertilizer storage
• Water Treatment: Sealed wastewater tanks

1. Overpressure Scenario:
   • Tank pressure exceeds setpoint → Valve opens to release air/gas
2. Vacuum Scenario:
   • Tank pressure drops below atmospheric → Valve admits ambient air
3. Normal Conditions:
   • Valve remains closed to prevent vapor loss/contamination

1. Tank Type: Fixed roof (needs P/V valve) vs. floating roof (needs vacuum breaker)
2. Fluid Properties: Corrosive? Flammable? (Material compatibility check required)
3. Flow Demand: Calculate required venting capacity based on tank filling/emptying rate
4. Regulations: API 2000 for oil tanks, FDA standards for food-grade applications

• Leak-Free Sealing - PTFE-coated diaphragms for tight closure
• Custom Solutions - Sizes, materials, and set pressures tailored to your tank
• Third-Party Tested - Flow performance verified by independent labs
• Global Compliance - Meets API, ISO, ATEX, and local safety codes