HNP10-A Adjustable Pressure Switch for OEM Equipment

HNP10-A is a compact adjustable pressure switch designed for OEM equipment, construction machinery, marine systems and valve remote-control applications — the ideal choice where high pressure resistance and a long mechanical life are required. A built-in piston is connected to a tightness spring; when pressure reaches the set value the movement triggers a pre-set mechanism that emits a switching signal. Setting range from 0.3 bar up to 100 bar, with optional piston-type set points of 200 bar or more; switching capacity 100 VA, repeatability ±3%, mechanical working life 1,000,000 switching cycles.

 Inquiry

High pressure resistance, long life — set point fixed at factory or adjusted on site

In HNP10-A, a built-in piston is connected to a tightness spring. Medium pressure drives the piston to compress the spring; once the pressure reaches the set value the mechanism trips and outputs a normally open / normally closed switching signal. The extraordinary volumetric pressure range ratio lets the set point be fixed at the factory or adjusted on site to suit the application.

It suits construction machinery, marine hydraulics and valve remote-control systems where high pressure resistance and long mechanical life matter. Setting range runs from 0.3 bar up to 100 bar, with optional piston-type set points of 200 bar or more; available ranges include 30–300 kPa, 100–1000 kPa, 1.6–4.0 MPa, 4.0–100 MPa and 10–40 MPa, plus customized versions.

Typical duties: construction machinery, marine and shipboard hydraulics, valve remote control systems, hydraulic power units, mobile hydraulics and lifting equipment, port and offshore machinery, mining equipment, hydrostatic test benches, factory automation, industrial equipment requiring high pressure resistance, machine building and OEM integration.

Is HNP10-A right for your application?

Choose this model when the following apply:

• You need a switching pressure monitor with high pressure resistance and long mechanical life (1,000,000 cycles).

• Your set point falls within 0.3–100 bar (piston type up to 200 bar or more).

• You need the set point fixed at the factory or adjustable on site to match the application.

• You need a normally open (NO) / normally closed (NC) switching output (SPDT).

• Install space is tight and you need a compact unit for valve blocks, frames and mobile hydraulics.

• Media are gas or liquid within −20 to 80 °C.

Check with us first if: you need a continuous analog or digital output, the media are strongly corrosive (confirm wetted material), pressure or temperature is outside the above range, or you need higher withstand pressure (diaphragm type 30 MPa, piston type 60 MPa; higher ranges available on request).

Why an adjustable mechanical pressure switch

High pressure resistance, long mechanical life

A proven mechanical design with 100 VA switching capacity, ±3% repeatability and a working life of 1,000,000 cycles suits long-running OEM equipment.

Flexible set point, one switch for many ranges

The extraordinary volumetric pressure range ratio allows factory-fixed or on-site adjustable set points, covering 0.3–100 bar across multiple ranges in one model for simpler selection.

Compact build for OEM

Small dimensions fit tight machine assemblies, valve blocks and mobile hydraulic systems, with custom connectors and threads.

Selectable connection and output

Pressure connection in galvanized steel or stainless steel with G1/4, NPT 1/4 or M20×1.5 threads (customizable); output normally open (NO) or normally closed (NC).

Technical Specifications

Installation & Commissioning

Confirm these four items before ordering:

1. Setting range and range version — pick the diaphragm or piston type by system pressure and set the point.

2. Process thread — confirm G1/4, NPT 1/4 or M20×1.5 matches your line connection.

3. Output type — choose normally open (NO) or normally closed (NC) for your control loop.

4. Media and material — confirm compatibility with the galvanized steel or stainless steel wetted parts and the temperature range.

Mount the pressure connection securely into the line and tighten the seal to avoid leakage; wire via the 6.3 × 0.8 mm spade terminals with reliable contact. To adjust the set point on site, follow the calibration scale and re-check the switch point, then confirm the action logic matches the control loop before commissioning.

Outputs & System Integration

• NO / NC (SPDT) switching output: wire straight into a PLC digital input, relay or contactor for pressure high / low alarm and interlock control.

• Spade-terminal electrical connection: standard 6.3 × 0.8 mm insert for quick, reliable wiring on OEM control panels.

• Optional protective caps: Types A / B / C suit different cable diameters to improve sealing and protection at the connection.

For OEM batch projects, please state the setting range, process thread, output type, media and temperature, required withstand pressure, working voltage and protective accessory needs so we can match the specification and give the best configuration.

Typical Applications

Construction machinery

Pressure monitoring and alarm in the hydraulic systems of excavators, loaders and other construction machines — high pressure resistance and shock tolerance for harsh duty.

Marine & shipboard hydraulics

Reliable switching pressure monitoring in shipboard hydraulic systems, meeting the corrosion and reliability demands of marine environments.

Valve remote-control systems

Pressure feedback and interlock control for valve remote-control systems, enabling remote valve start / stop and protection.

Mobile hydraulics & lifting equipment

Compact, high-pressure switching output for mobile hydraulic, lifting and port machinery to keep equipment running safely.

Hydraulic power units & test benches

Pressure monitoring and interlock protection for hydraulic power units, hydrostatic test benches and factory automation.

Information Needed for Selection

To confirm the right HNP10-A configuration, please provide: setting range and range version, process thread, output type (NO or NC), media name and temperature, required withstand pressure, working voltage and protective accessory needs. Where needed, we will also confirm installation space and electrical connection so the switch point matches your site conditions.

FAQ

What pressure range fits my hydraulic circuit?

Tell us your normal and alarm pressure. The standard setting range is 0.3–100 bar, with piston-type options up to 200 bar or more and multiple range versions plus customization.

How do diaphragm and piston versions differ in overload capacity?

The diaphragm type withstands up to 30 MPa and the piston type up to 60 MPa. Choose the piston version for higher overload; higher ranges are available on request.

Can this switch handle rapid pressure cycling in mobile hydraulic equipment?

Yes. The mechanical design is proven, with 100 VA switching capacity, ±3% repeatability and a working life of 1,000,000 cycles — suited to frequent-duty mobile hydraulics.

Which thread and NO or NC contact suit an OEM valve block installation?

Choose G1/4, NPT 1/4 or M20×1.5 (customizable). For the output, pick normally closed (NC) for loss-of-pressure protection and normally open (NO) for pressure-arrival alarming.

How is the field set point adjusted without reducing switching repeatability?

Adjust the set point along the calibration scale and re-check the switch point; repeatability stays at ±3%. Confirm the action before commissioning.

Downloads

HNP10-A Adjustable Mechanical Pressure Switch Datasheet (PDF)