Value Brand Compound Gauge Ammonia 2-1/2 In 150 Psi

Compound Gauge for Ammonia Systems

The Value Brand compound gauge measures vacuum and pressure in ammonia refrigeration circuits. A 2-1/2 inch dial displays readings from 30 inches of mercury vacuum to 150 psi. The black steel case and polycarbonate lens protect the movement in harsh environments. Technicians working on industrial refrigeration plants will find the scale suitable for routine service checks.

Accuracy and Connection Limits

The gauge operates to a +/-3-2-3 percent accuracy specification across the full range. The smallest graduations are 2 psi and 5 inches of mercury. A 1/4 inch NPT lower connection threads directly into standard service ports. The stainless steel Bourdon tube handles the ammonia media while the steel socket resists thread damage. Operating temperature spans -40 to 150 degrees Fahrenheit.

Installation Notes

Thread the lower mount connection into the port using a wrench on the steel socket flats. Do not apply force to the case or lens. Leaks usually come from missing thread sealant or damaged NPT threads. Verify the pointer rests at zero before pressurising the system. The one-year manufacturer warranty covers defects in materials and workmanship.