Product details
Weiss Liquid Filled Compound Gauge | LF441-V30 | 4″ Dial | 30″Hg Vac to 30 PSI
Product Description
The LF441-V30 belongs to the rugged Weiss LF44 series, specifically built to handle mechanical stress that would typically cause a standard dry gauge to fail. This Compound Gauge features a dual-function scale that measures from 30″Hg Vacuum up to 30 PSI. In the UAE’s industrial sectors, this is a critical instrument for monitoring the suction side of pumps in Dubai and Abu Dhabi, ensuring they are primed and operating within safe vacuum limits.
The gauge is Glycerin Filled, providing two major benefits: it dampens the internal movement to eliminate needle flutter caused by pump cavitation or vibration, and it acts as a permanent lubricant for the gear mechanism. Housed in a 304 Stainless Steel case with a 1/4″ NPT Lower (Bottom) Mount connection, it is hermetically sealed to withstand the high humidity and corrosive saline air of the Middle East.
Key Features
- Compound Measurement: Successfully monitors both vacuum (in Hg) and positive pressure (PSI) on a single high-visibility dial.
- Vibration Dampening: Glycerin filling ensures a steady pointer for accurate diagnostics on high-vibration pump skids.
- Industrial-Grade 4″ Dial: The oversized face provides superior resolution, allowing technicians to read small vacuum changes easily.
- Corrosion-Resistant Housing: The 304 Stainless Steel case is ideal for the demanding coastal and industrial environments of the UAE.
- Dual Scale Readout: Simultaneously displays vacuum/pressure in imperial and metric units, satisfying international engineering standards.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | LF441-V30 |
| Dial Size | 4″ (100 mm) |
| Range | 30″Hg Vacuum to 0 to 30 PSI |
| Filling | Glycerin (Standard) |
| Connection Location | Lower Mount (Bottom) |
| Connection Size | 1/4″ NPT |
| Case Material | 304 Stainless Steel |
| Internal Material | Copper Alloy / Brass |
| Accuracy | $\pm$
1.0% of Full Scale (ASME B40.100 Grade 1A) |
Frequently Asked Questions
- Q: Why do I need a liquid-filled gauge on a pump suction line?
- A: Pump suction often experiences rapid pressure fluctuations and mechanical vibration. Liquid filling prevents the needle from bouncing, which protects the gauge and allows for a clear reading.
- Q: Is this gauge suitable for refrigeration vacuum testing?
- A: Yes, it can monitor vacuum levels; however, for deep vacuum measurements, a specialized micron gauge is usually required.
- Q: What does the “V30” in the model number mean?
- A: “V” stands for Vacuum, and “30” indicates the positive pressure limit (30 PSI) above the vacuum range.