Victor SR 250-300-AM Medium Duty Ammonia Regulator, 10-300 PSIG

Technical Specification: Victor SR 250-300-AM

The Victor SR 250-300-AM (SKU: 0781-0061) is a single-stage, medium-duty regulator engineered specifically for anhydrous ammonia service. It addresses the material compatibility challenges inherent to ammonia handling by eliminating yellow metals from the wetted stream. The body and housing cap are machined from aluminum, while the diaphragm is fabricated from stainless steel. This construction prevents the rapid corrosion and deterioration that standard brass regulators would suffer if exposed to ammonia, ensuring compliance with safety standards and extending the service life of the equipment.

Performance Characteristics
The regulator provides a delivery pressure range of 10-300 PSIG, controlled via a precision stem-type seat mechanism. It is designed for applications requiring stable pressure reduction from bulk storage or cylinder sources. The inlet and outlet ports are configured with 1/4" NPT Female threads, necessitating appropriate fittings for connection to supply lines or equipment. The unit does not utilize standard CGA cylinder connections directly on the body, offering flexibility for hard-piped or custom hose assemblies common in ammonia systems.

Operational Features
Operators benefit from 2.5-inch gauges that display delivery pressure and supply pressure (where applicable), allowing for accurate system monitoring. The stainless steel diaphragm offers superior sensitivity and fatigue resistance compared to elastomeric alternatives in this chemical environment. The regulator is rated for a maximum inlet pressure consistent with ammonia vapor pressures, and its flow coefficient (Cv) is optimized for medium-duty flow requirements. Maintenance and inspection protocols should strictly follow guidelines for ammonia equipment, given the hazardous nature of the gas.