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Weldead Diaphragm Pressure Gauge In India

100% Laser-Welded All-Stainless-Steel Diaphragm Gauges with Zero Mechanical Gasket Leak Paths

ISO 9001:2015 Certified Manufacturing
IS3624 & EN 837-1 Standards
NABL Traceable Test Calibration
Direct Factory Dispatch Across India
Precision Instrumentation

Weldead Diaphragm Pressure Gauge In India

As a pioneer in all-welded instrument technology, FGB Manufacturing Co. delivers high-reliability Weldead Diaphragm Pressure Gauge In India (All-Welded Diaphragm Seal Gauges). Unlike conventional two-piece bolted diaphragm seals that rely on elastomer O-rings prone to degradation, our welded diaphragm gauges feature a continuous robotic laser-welded joint between the upper body, diaphragm foil, and process socket—guaranteeing 100% leak-tight integrity for toxic, volatile, pyrophoric, and high-temperature chemicals.
  • Continuous Laser-Welded Construction with Zero Gasket or O-Ring Failure Risk
  • Helium Mass Spectrometer Leak Tested to 1x10⁻⁸ mbar·l/s for Absolute Containment
  • Corrosion Resistant SS 316L, Hastelloy C-276, Monel & Inconel Diaphragms
  • Compact Threaded ("I" section) or Direct Welded Process Connection
Welded Diaphragm Pressure Gauge Manufactured by FGB in India

FGB Precision Assembly: Weldead Diaphragm Pressure Gauge 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 Ranges -1 to 0 Bar (Vacuum) up to 0 to 400 Bar (6000 PSI)
Joint Construction 100% Hermetically Laser Welded / TIG Welded
Diaphragm Metallurgy AISI SS 316L (Standard), Hastelloy C-276, Tantalum, Monel
Wetted Body AISI SS 316 / SS 316L
Transmission Liquid High-Temperature Silicone Oil (-40°C to +250°C)
Connection Sizes 1/4", 3/8", 1/2" BSP / NPT Male or Female Thread
Accuracy Class Class 1.0 (±1.0% FSD) conforming to IS3624 / EN 837-1
Design Highlights

Key Engineering & Operational Advantages

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

Zero Leak Path

No internal gaskets or bolts that can loosen under vibration or degrade under corrosive chemical attack.

Helium Leak Checked

Vacuum chamber leak tested with mass spectrometry to ensure zero fugitive emissions of hazardous fluids.

High Temperature Immunity

Withstands high thermal cycling where traditional elastomeric seal O-rings harden and crack.

Heavy Duty Durability

Ideal for continuous 24/7 service in petrochemical refineries and fertilizer plants.

Field Applications

Recommended Industries & Operating Environments

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

Chlorine, Bromine & Corrosive Acid Pipelines
Petrochemical Hydrocarbon Refineries
High-Temperature Thermal Fluid / Thermic Fluid Loops
Hazardous & Explosive Chemical Reaction Vessels
Offshore Platform Gas Scrubbers & Compressors
Paint Pigment & Polymerization Reaction Plants
Questions & Answers

Frequently Asked Questions (FAQs)

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

Bolted seals utilize an elastomeric gasket or Teflon O-ring to seal the diaphragm against the body. Over time, heat, vibration, and chemical attack cause the gasket to leak, causing fill fluid loss or toxic fluid release. Welded diaphragm seals eliminate gaskets entirely with a permanent laser weld.

Yes, our welded construction is specifically engineered to handle full vacuum (-1 bar) without diaphragm delamination or air ingress.

We offer SS 316L, Hastelloy C-276, Monel 400, Inconel 625, and Tantalum.

Direct Factory Quote

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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.