PCM-B Series Pressure Gauges: Reliable Pressure Monitoring for Transformers & Industrial Applications
At Hangzhou Weshare Imp. & Exp. Co., Ltd., we offer the PCM-B Series Pressure Gauges – high-quality dry-type pressure gauges designed for pressure monitoring in oil-immersed transformers, industrial systems, and general machinery. Built with durable materials and precision craftsmanship, these gauges deliver accurate, long-lasting performance across a wide range of operating conditions.
1. Core Specifications & Key Features
The PCM-B series is engineered for versatility, with flexible options to match diverse application requirements:
| Parameter | Details |
|---|---|
| Dial Size | 1.5", 2", 2.5", 3", 3.5", 4", 4.5", 6" |
| Case & Bezel | Black painted steel case (corrosion-resistant finish) |
| Lens | Glass, acrylic, or polycarbonate (PC) with snap-in, twist-on, or twist-lock design |
| Pointer | Aluminum, anodized black pointer for clear visibility |
| Movement | Brass movement for consistent performance |
| Bourdon Tube | Brass or phosphor bronze (compatible with most fluids) |
| Connection Material | Brass or plated alloy (bottom, center back, or center back with U-clamp mounting options) |
| Thread Types | 1/8", 1/4", 3/8", 1/2"; BSP, BSPT, NPT, PT, G |
| Accuracy | 1.6%–4% of full scale value (FSV) |
| Pressure Range | -1 bar ~ 600 bar (supports mPa, kPa, psi units; vacuum ranges also available) |
| Working Pressure | 75% of FSV (continuous operation) |
| Temperature Ratings | Max process temperature: 130°CAmbient temperature: -40°C ~ 65°C |
| Customization | HUIFENG logo or custom branding available |
Mounting Options
Bottom mount: Direct installation on tanks/pipes (common for transformers)
Center back mount: Flush installation on panels
Center back with U-clamp: Secure mounting for confined spaces
2. Key Roles in Transformer & Industrial Applications
In power transformers and industrial systems, the PCM-B pressure gauge is a critical monitoring component with three core functions:
Real-Time Pressure MonitoringWith an accuracy of 1.6%–4%, the gauge continuously displays internal pressure to help operators track the health of oil-immersed transformers, hydraulic systems, and pneumatic equipment. This prevents overpressure damage and ensures stable operation.
Fault Early WarningAbnormal pressure spikes or drops signal potential issues like leaks, blockages, or internal faults. The gauge provides early visibility to enable timely maintenance, avoiding costly downtime or equipment failure.
System Calibration & Maintenance GuidancePressure readings help verify system performance during commissioning and routine maintenance. They also guide oil changes, seal replacements, and troubleshooting for transformers and industrial machinery.
3. Manufacturing & Production Process
Every PCM-B gauge undergoes strict quality control to meet industrial standards:
Step 1: Raw Material Selection
We source high-grade materials tailored for durability and compatibility:
Steel case: Black painted steel with anti-corrosion coating for outdoor/industrial use.
Brass components: Brass movement and Bourdon tubes for stable, long-term performance with most fluids.
Glass/acrylic lens: Scratch-resistant options for clear visibility in harsh environments.
Step 2: Precision Machining & Assembly
Bourdon Tube Forming: Brass/phosphor bronze tubes are precision bent and calibrated to ensure accurate pressure-to-pointer conversion.
Movement Assembly: Brass internal mechanisms are assembled in a clean environment to avoid contamination, ensuring smooth pointer movement.
Case & Sealing: Components are sealed with high-quality gaskets to prevent dust and moisture ingress, critical for long-term reliability.
Step 3: Calibration & Testing
Pressure Calibration: Each gauge is calibrated at multiple pressure points (0%, 25%, 50%, 75%, 100% of FSV) to verify accuracy within the specified range.
Leak & Durability Test: Seals are pressure-tested to ensure no leaks under operating conditions.
Visual & Functional Inspection: Final checks confirm pointer alignment, lens clarity, and thread integrity.
4. Packaging & Shipping
To protect gauges during transit:
Individual Protection: Each gauge is wrapped in anti-corrosion film with port caps installed to prevent contamination.
Outer Packaging: Packed in shock-resistant export cartons or wooden crates with foam padding to avoid damage during shipping.
Documentation: Includes material test reports (MTRs), calibration certificates, and packing lists for seamless customs clearance.
5. Advantages & Disadvantages
✅ Key Advantages
Wide Compatibility: Works with transformer oil, air, water, and most industrial fluids, making it suitable for diverse applications.
Flexible Mounting & Thread Options: Multiple thread sizes (1/8"–1/2") and mounting styles fit transformers, machinery, and panels.
Robust Construction: Steel case, brass internals, and corrosion-resistant coating ensure durability in harsh environments (-40°C to 65°C).
Customizable: Supports custom logos, dial sizes, and pressure ranges to match OEM requirements.
Cost-Effective: Reliable performance at a competitive price point for bulk industrial and transformer projects.
❌ Limitations & Considerations
Dry-Type Design: Not shock-resistant (no liquid filling), so it may experience pointer jitter in high-vibration environments (e.g., heavy industrial machinery).
Maximum Temperature Limit: 130°C process temperature rating, not suitable for ultra-high-temperature applications.
Accuracy Range: 1.6%–4% accuracy is sufficient for most industrial use cases but not ideal for ultra-precision laboratory applications.
6. Frequently Asked Questions (FAQ)
Q1: What pressure ranges are available for the PCM-B series?
A: We offer ranges from -1 bar (vacuum) to 600 bar, including common options like 0–1 bar, 0–10 bar, 0–100 bar, and vacuum ranges (-76 cmHg/0 to -76 cmHg/15 bar). Custom ranges are available upon request.
Q2: Can these gauges be used in oil-immersed transformers?
A: Yes. The brass internals and compatible thread sizes (e.g., 1/4" NPT) make them suitable for transformer pressure monitoring. They work with mineral oil, synthetic ester oil, and silicone oil.
Q3: What mounting options are available?
A: We offer three mounting styles: bottom mount, center back mount, and center back with U-clamp, supporting both direct tank installation and panel mounting.
Q4: How accurate are these gauges?
A: Accuracy ranges from 1.6% to 4% of full scale value, depending on the dial size. Larger dials (63mm+) typically offer higher accuracy (1%–4%).
Q5: Do you provide custom branding for OEM orders?
A: Yes. We support custom logos, dial markings, and packaging to match your brand requirements.
7. Why Choose Weshare for Pressure Gauges?
As a trusted supplier of industrial and transformer components, Hangzhou Weshare Imp. & Exp. Co., Ltd. delivers reliable pressure monitoring solutions with:
Strict quality control and full calibration for every gauge
Flexible customization to match your project specifications
Competitive pricing for bulk orders
Responsive customer support and technical guidance
📧 Contact our team today to discuss your pressure gauge requirements and receive a customized quotation.