High Pressure Pressure Gauges (HP)

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Brief Description

High Pressure (HP) Pressure Gauges are precision-built instruments designed to accurately measure static pressures ranging from 1,000 bar up to 6,000 bar (10,000 to 100,000 psi), requiring specialized construction for safety and reliability.

In-depth Overview

Measuring extreme pressure necessitates specific design features to prevent rupture and maintain safety. These gauges utilize specialized, thick-walled Bourdon tubes and often feature a solid front/blow-out back case design, directing any internal failure energy away from the operator . The wetted parts are typically made of high-strength alloys like 316L stainless steel or Inconel. High pressure gauges are commonly dry-filled or silicone-filled to dampen vibration, and they adhere to rigorous standards like ASME B40.100.

Specification

Parameter	Details
Max Pressure Range	0 to 6,000 bar (100,000 psi)
Safety Feature	Solid Front, Blow-out Back Case
Bourdon Tube Type	Coil or Helical (Heavy Wall Construction)
Case Filling	Dry or Silicone Oil (for extreme temperatures)
Wetted Parts Material	Stainless Steel 316L, Inconel, or Monel
Accuracy Class	Typically Class 1.0 (±1% of FS) or better
Connection Type	High Pressure Threaded (e.g., Autoclave Engineers or NPT)
Dial Size	100mm or 150mm (for better resolution)

Applications

Water Jet Cutting Equipment: Monitoring the ultra-high pressure required for abrasive jet machining.
High Pressure Test Benches: Hydrostatic and burst pressure testing of valves, hoses, and vessels.
Polyethylene Production: Monitoring pressure in high-pressure polymerization reactors.
Oil and Gas Wellhead Equipment: Monitoring BOP (Blowout Preventer) systems and injection lines.

Key Advantages

Maximum Safety: Specialized case designs and reinforced components protect operators from pressure failures.
Robustness: Engineered to withstand the severe stress and fatigue associated with extreme pressure cycling.
Material Integrity: High-strength, traceable materials ensure the stability of the pressure boundary.
Precision at Range: Maintains high accuracy even at the highest end of the pressure scale.

Payment and Shipping

We accept secure international payments including T/T and L/C. High pressure gauges are precision items requiring specialized assembly and testing; lead times are typically 4-6 weeks. Due to safety concerns, these items are shipped with complete material traceability reports and packaged in heavy-duty wooden or plastic containers to prevent any shock or mechanical damage to the sensitive Bourdon system.

Frequently Asked Questions

Q: Why is a solid front case used on high pressure gauges?
A: A solid front case means the gauge reading face is reinforced with a solid plate, while the back panel is designed to be a thin, intentionally weakened blowout disc. This ensures that if the Bourdon tube ruptures, the high-pressure media is vented safely out the back, away from the operator standing in front of the gauge.

Q: Are High Pressure (HP) gauges prone to fatigue failure?
A: They are designed to minimize it, but due to the extreme stress on the Bourdon tube, they are more susceptible than low-pressure gauges. It's crucial not to operate them continuously above 75% of the full scale and to follow a strict replacement schedule.

Q: Can I use a standard NPT thread connection on a 4,000 bar system?
A: No. Standard NPT connections are not rated for such extreme pressures. Specialized high-pressure connections (e.g., cone and thread fittings like Autoclave Engineers) are required to prevent thread deformation and leakage.

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High Pressure Pressure Gauges (HP) Manufacturers

Wuxi Huihua Special Instrumentation Co., Ltd. was established in December 2001, the registered capital is 5 million yuan, the existing staff of more than 50 small and medium-sized joint-stock enterprises.
The company specialises in the production of various types of special instruments, alternative to the localisation of imported instruments.To seismic pressure gauge, seismic electric contact pressure gauge, stainless steel pressure gauge, diaphragm corrosion-resistant pressure gauge, marine pressure gauge and other series as the main products. On the basis of field instruments, we have developed various kinds of pressure transmitters, pressure controllers, digital pressure gauges and so on. There are more than 30 series and 3000 specifications. Products are widely used in petroleum, chemical, paper, metallurgy, mining, chemical fibre, electric power, food, environmental protection, rubber and plastic, hydraulics and many other industries, and more than 2,000 domestic customers to establish a friendly relationship with the national large and medium-sized enterprises to establish a good partnership, won the majority of users praise, and set up a corporate brand image.