Process Instrumentation
PX309 Pressure Transmitter
General-purpose 4-20 mA pressure transmitter.
WI
Weiss Instruments
4½" Process Pressure Gauge (NF4UGY / LF4UGY Series)
4½" solid-front safety process gauge with blow-out back, dry or liquid-filled.
Key Features
- Solid front construction with isolating solid wall between dial and Bourdon tube
- Blow-out back releases from case on Bourdon tube rupture
- Choice of brass/bronze, 316L stainless steel or Monel wetted parts
- Dry or liquid-filled construction, field-fillable with no extra kit
- Bushed stainless steel rotary movement
- Black aluminum, micrometer-adjustable pointer
- White aluminum dial with dual PSI/kPa scales
- Acrylic window, Buna N gaskets
- ±0.5% accuracy, ASME B40.1 Grade 2A
- Lower or lower-back 1/4" or 1/2" NPT connections
Overview
The Weiss 4½" Process Pressure Gauge is designed for severe service applications where operator safety is a factor. This solid front gauge is equipped with a solid wall separating the indicating dial from the Bourdon tube, and a blow-out back that releases from the case if the Bourdon tube should rupture. Available with phosphor bronze/brass, 316 stainless steel or Monel internals, liquid-filled or dry construction, it is ideally suited to the requirements of the Process, Power and Chemical industries, and offers the benefit of field filling without additional kits or accessories.
Working Principle
A rotary Bourdon tube movement in one of three wetted-parts materials (brass/bronze, 316L stainless steel, or Monel) drives a micrometer-adjustable pointer across a dual-scale dial; a solid wall isolates the dial from the tube and a blow-out back releases pressure safely away from the operator in the event of tube failure.
Applications
Benefits
- Blow-out back and isolating solid wall protect operators in severe-service pressure applications
- Field-fillable design avoids extra kits or accessories when converting to liquid fill
- Choice of three wetted-parts materials matches the gauge to the process media
Technical Specifications
| Dial Size | 4-1/2" |
|---|---|
| Accuracy | ±0.5%, ASME B40.1 Grade 2A |
| Dial | White aluminum, black markings, dual PSI/kPa scales |
| Movement | Bushed stainless steel rotary |
|---|---|
| Case | Black fiberglass-reinforced thermoplastic (Pocan) |
| Ring | Reinforced polypropylene |
| Window | Acrylic |
| Gaskets | Buna N |
| Safety Feature | Blow-out back |
| Socket/Tube Materials | Brass/Bronze (1), 316L S.S. (2), Monel (5) |
|---|---|
| Fill | Dry (NF4UGY) or Liquid-Filled (LF4UGY) |
| Connections | 1/4" or 1/2" NPT, lower or lower-back |
Downloads
Datasheet (PDF)PDF
Frequently Asked Questions
What warranty is offered on this product?
All Tetracon-supplied instruments carry the original manufacturer warranty (typically 12–24 months) plus first-line local support from our Islamabad service centre.
Do you provide installation and commissioning?
Yes. Our manufacturer-trained engineers offer on-site installation, commissioning and startup training anywhere in Pakistan.
Are spares and calibration available locally?
Common spares are held in local stock. Calibration is available at our lab or on-site with NIST-traceable reference standards.
How long is the typical lead time?
Stocked items ship within 3–5 working days; engineered configurations typically 6–10 weeks depending on manufacturer schedule.
Request a Quote — 4½" Process Pressure Gauge (NF4UGY / LF4UGY Series)
Complete the form below and one of our engineers will respond within 1 working day with pricing and lead time. Prefer email? Contact our sales team.
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