(+91) 9820305403 fgb.vinesh@gmail.com C-1209-B, Ghatkopar Ind. Est. 2nd Flr, LBS Marg, Ghatkopar W
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Ammonia Pressure Gauge Manufacturers In India

Corrosion-Proof Dual Pressure & Temperature Saturation Gauges for Ammonia (NH3) Refrigeration Plants

ISO 9001:2015 Certified Manufacturing
IS3624 & EN 837-1 Standards
NABL Traceable Test Calibration
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Precision Instrumentation

Ammonia Pressure Gauge Manufacturers In India

FGB Manufacturing Co. is an industry-leading Ammonia Pressure Gauge Manufacturers In India, producing heavy-duty pressure and compound gauges engineered specifically for anhydrous ammonia (NH3) refrigeration circuits. Because ammonia aggressively attacks brass, bronze, and copper alloys, our ammonia gauges are constructed with 100% All-Stainless-Steel (SS 304/316) wetted components. Furthermore, the dial features concentric dual scales displaying both pressure and the corresponding ammonia saturation temperature.
  • 100% Free from Copper & Brass Alloys to Prevent Fatal Ammonia Embrittlement
  • Dual Direct-Reading Scales: Pressure (Bar / PSI / kg/cm²) & Equivalent NH3 Temperature (°C / °F)
  • Available in Compound Suction Ranges (-1 to +10 Bar, -30 inHg to 150 PSI) & Discharge Ranges
  • Weatherproof IP65 Stainless Steel 304 Casing with Liquid Glycerin Dampening
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Ammonia (NH3) Pressure Gauge Manufactured by FGB in India

FGB Precision Assembly: Ammonia Pressure Gauge Manufacturers In India

Technical Parameters

Standard Technical Specifications

Engineered to satisfy demanding industrial criteria. Review our standard parameter ranges or request custom connection threads, dial branding, and special wetted alloys.

Specification Parameter Standard Technical Values / Manufacturing Options
Dial Sizes 63mm (2½"), 100mm (4"), 150mm (6")
Pressure Scales Compound (-1 to +10 Bar / -1 to +15 Bar) & High Discharge (0 to 25 Bar / 0 to 35 Bar)
Temperature Scale Red/Green Saturated Ammonia (R717) Temperature scale (-40°C to +50°C)
Wetted Parts AISI SS 316 Stainless Steel Bourdon & Socket (Zero Brass)
Accuracy Class Class 1.0 (±1.0% FSD) on 100mm/150mm; Class 1.6 on 63mm
Case Material AISI SS 304 with Bayonet Lock Bezel Ring
Process Connection 1/4", 3/8", 1/2" BSP / NPT Male Thread
Window Toughened Safety Glass / Shatterproof Polycarbonate
Design Highlights

Key Engineering & Operational Advantages

Built for continuous 24/7 industrial performance, long service life, and unmatched measurement stability.

Dual Temperature Saturation Scale

Allows refrigeration operators to read evaporation and condensing temperatures directly without thermodynamic tables.

Zero Brass Metallurgy

Pure SS 316 wetted parts resist rapid ammoniacal stress corrosion cracking and copper leaching.

Anti-Pulsation Damping

Glycerin filling cushions internal mechanism against compressor discharge valve pulses.

Severe Cold Storage Duty

Hermetic sealing prevents humid ice buildup and dial fogging in sub-zero compressor rooms.

Field Applications

Recommended Industries & Operating Environments

Trusted by plant engineers, system integrators, and OEM equipment builders across diverse sectors.

Cold Storage & Frozen Food Warehouses
Ice Manufacturing Plants & Ice Arenas
Dairy & Brewery Industrial Chilling Systems
Chemical Ammonia Synthesis & Storage Spheres
Industrial Fertilizer (Urea / Ammonium Phosphate) Plants
Ammonia Evaporative Condensers & Compressors
Questions & Answers

Frequently Asked Questions (FAQs)

Find answers to common technical queries regarding specifications, selection, calibration, and delivery.

Standard gauges contain copper, bronze, or brass bourdon tubes. Ammonia reacts aggressively with copper to form explosive cuprammonium complexes and causes catastrophic metal embrittlement within days. Ammonia gauges must be 100% stainless steel.

The temperature scale shows the exact saturation (boiling/condensing) temperature of anhydrous ammonia at the measured pressure, enabling refrigeration engineers to monitor superheat and subcooling instantly.

For low-pressure suction lines: -1 to +9 bar or -1 to +12 bar compound. For high-pressure compressor discharge lines: 0 to 25 bar or 0 to 30 bar.

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Fill in your required quantity and dial specifications. Our technical engineering team will respond within 2 hours with wholesale factory pricing.

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