Description

Ammonia Pressure Gauge is designed for ammonia refrigeration applications and come with an ammonia scale on dial. Ammonia pressure gauge has an all stainless steel body and are liquid filled standard.

Specifications
Sizes: 2.5″ & 4″ (63 & 100 mm)
Accuracy: ±1.6%(ASME B40.1 Grade A)
Case: Steel case black painted (other options available upon request)
Ring: Crimped or Bayonet Bezel
Lens:  Polycarbonate
Wetted parts: 316 Stainless Steel
Operating Temperature: Ambient: -40 to 65°C (-40°F to 149°F)
Process fluid: max 65°C (149°F)
Dial: Aluminum with black & red markings
Pointer: Black aluminum
Connection:   1/4″ or 1/2″ NPT or BSP bottom or back
Ranges: 30″Hg-150psi/°C or 30″Hg-300psi/°C (optional °F)
Protection degree: IP65
Glycerin filled

We invite you to check out our post:  When should you use liquid-filled pressure gauges?

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Operation Recommendations:

Admit pressure slowly by throttling gauge cock. The maximum, pressure at which a pressure gauge is continuously operated shall not exceed 75% of full scale pressure.
The gauge selected should have a full scale pressure of approximately twice the intended operating pressure.
If it is desirable to compensate the indication for head effect in the piping leg it can be accomplished by removing bezel ring and window and resetting pointer using the pointer
adjusting screw.
Relieving Case Pressure: Filled cases or other sealed cases must be vented to avoid internal pressure, which can affect accuracy.
After installation, cut or pierce fill plug at top of case for best accuracy.