EN837-1 4 Inch Size Pressure Gauge

EN837-1 4 inch size pressure gauge

EN837-1 oil filled pressure gauge is a mechanical Bourdon tube pressure instrument designed according to EN837-1 standard. The 4 inch (100mm) dial version is widely used in hydraulic systems, compressors, pumps, and industrial process pipelines where vibration and pressure pulsation exist.

The liquid filling (glycerin or silicone oil) is used to dampen pointer oscillation and improve readability under unstable pressure conditions.

This model typically uses a 1/4" BSP / NPT process connection depending on installation requirements.

Product Description:

Designed for severe industrial service, the EN837-1 4 inch size pressure gauge is a ruggedly constructed stainless steel gauge that provides resistance to the most corrosive media and environments. This pressure gauge is supplied standard with liquid fill. It features 316 stainless steel wetted parts, a 304 stainless steel case and bayonet ring, and an adjustable pointer and laminated safety glass window. The 21⁄2" gauge size offers a welded connection.

 

Packing &Delivery:

Packing: separate paper box by per unit.

Packing type: polyester bag +paper box, carton box, pallet.

Carton weight: 20-25kg

Lead time: 15-30 days

Standards & Design Specification

Standard: EN837-1

Dial Size: 4 inch (100mm)

Type: Liquid filled pressure gauge

Filling Medium: Glycerin oil / Silicone oil

Measuring Element: Bourdon tube

Movement: Brass or stainless steel

Case Material: Stainless steel 304 / 316 (optional)

Window: Safety glass / polycarbonate

Connection: 1/4" BSP / NPT / customized

Mounting: Bottom mount / back mount

About us:

 

Manufacturing & Quality Control

Each EN837-1 pressure gauge is produced under standardized process control:

100% calibration before shipment

Leakage test for sealed system

Vibration stability test (oil-filled units)

Dial accuracy verification

Thread compatibility inspection

OEM / ODM Capability

Custom dial logo

Private labeling

Special pressure range design

Stainless steel upgrade options

Different connection standards for regional markets

 

Production and inspection

Packing and shipping:

• Working Conditions

  Medium: Gas, liquid, oil, non-corrosive fluids

  Temperature range: -20°C to +60°C (liquid filled)

  Ambient vibration: Suitable for high vibration systems

  Working pressure: Continuous load ≤ 75% FS

• Key Structural Features

  Liquid Filling System

  Oil filled housing reduces pointer vibration caused by:

  Pump pulsation

  Compressor fluctuation

  Hydraulic shock

  Pipeline instability

• Typical Applications

  Hydraulic power unit (HPU)

  Air compressor system

  Water pump station

  Industrial machinery

  Oil & gas pipeline monitoring

  Construction equipment hydraulic system

  Marine equipment systems

FAQ

Q1: Why use oil filled pressure gauge?
A: To reduce pointer vibration and improve reading stability in pulsating pressure systems.

Q2: What is EN837-1 standard?
A: It is the European standard defining mechanical pressure gauge design, safety, and accuracy requirements.

Q3: Can I choose different thread types?
A: Yes, 1/4" BSP, NPT, and customized threads are available.

Q4: Is 4 inch size standard?
A: Yes, 100mm (4") is one of the most common industrial dial sizes.

 

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