Case: Component Specs, Materials & Applications

Component Specifications

Definition

The case is the outer protective housing of a pressure gauge assembly, designed to enclose and shield the internal measurement mechanism (Bourdon tube, diaphragm, or capsule) from external environmental factors such as dust, moisture, chemicals, and physical impacts. It provides structural support for mounting the gauge, ensures proper alignment of components, and often includes features like pressure relief vents or seals for hazardous environments. Cases are engineered to maintain calibration stability under varying operational conditions while allowing clear visibility of the dial through a window or lens.

Working Principle

The case functions as a rigid enclosure that protects the sensitive internal components from external disturbances. It maintains a stable internal environment to prevent mechanical misalignment, corrosion, or contamination that could affect measurement accuracy. By providing a sealed or vented barrier, it ensures the gauge responds only to the intended pressure media while withstanding operational stresses like vibration, temperature fluctuations, and overpressure conditions.

Materials

Typically made from corrosion-resistant materials: stainless steel (AISI 304/316 for general industrial use), aluminum alloys (for lightweight applications), brass (for non-corrosive environments), or engineered plastics (polycarbonate, ABS for cost-effective or chemical-resistant needs). Seals and gaskets are often silicone, Viton, or EPDM rubber.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Weight	0.1-2.0 kg depending on material and size
Mounting	Direct stem mount, surface mount, panel mount, or flush mount
Case Diameter	40mm, 50mm, 63mm, 100mm standard sizes
Connection Size	1/4" NPT, 1/2" NPT, G1/4, M20x1.5
Pressure Rating	Up to 10,000 psi (690 bar) depending on design
Window Material	Tempered glass, polycarbonate, or acrylic
Ingress Protection	IP65, IP67, or NEMA 4X for environmental sealing

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 5171, DIN 16085, ASME B40.100

Parent Products

This component is used in the following industrial products

Pressure Gauge Assembly

The Pressure Gauge Assembly is a specialized component within a Homogenizer Unit that monitors and displays the internal pressure during homogenization processes.

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Engineering Analysis

Risks & Mitigation

Corrosion leading to structural failure
Improper sealing causing internal contamination
Material incompatibility with process media
Overpressure causing case rupture
Vibration-induced fatigue cracks

FMEA Triads

Trigger: Corrosive environment exposure
Failure: Case wall perforation or seal degradation
Mitigation: Use corrosion-resistant materials (stainless steel 316), apply protective coatings, implement regular inspection schedules

Trigger: Excessive vibration or mechanical shock
Failure: Crack formation at stress points or window breakage
Mitigation: Design with reinforced ribs, use shock-absorbing mounts, select tempered glass or polycarbonate windows

Trigger: Improper material selection for process media
Failure: Chemical attack leading to case deterioration
Mitigation: Conduct material compatibility analysis, use lined cases or chemically resistant plastics, specify appropriate gasket materials

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ISO 2768-m, pressure containment per ASME B40.100

Test Method

Hydrostatic pressure testing, IP/NEMA ingress protection testing, material certification (mill test reports), vibration testing per IEC 60068-2-6

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Case

Manufacturer profiles associated with Case.

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Frequently Asked Questions

What are the main differences between stainless steel and plastic pressure gauge cases?

Stainless steel cases offer superior durability, corrosion resistance, and temperature tolerance for harsh industrial environments, while plastic cases are lighter, cost-effective, and suitable for less demanding applications or chemical compatibility needs.

How does case design affect pressure gauge accuracy?

Proper case design minimizes internal stress, vibration transmission, and thermal expansion effects that can distort the measurement mechanism. Sealed cases prevent contamination, while vented cases equalize atmospheric pressure for gauge-type instruments.

Can pressure gauge cases be customized for specific applications?

Yes, cases can be customized with special coatings, materials, mounting configurations, window types, or explosion-proof designs to meet specific environmental, safety, or operational requirements.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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