Hydraulic Diaphragm Metering Pumps - Hydro/ ...

Hydraulic Diaphragm Metering Pumps - Hydro/ 4

The Hydro/ 4 is an extremely robust hydraulic diaphragm metering pump, which meets the most exacting safety requirements. It is equipped as standard with a pressure relief valve and PTFE multi-layer diaphragm with diaphragm rupture warning system.

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The Hydro/ 4 hydraulic diaphragm metering pump (HP4a), together with the Hydro/ 2 and Hydro/ 3 pumps, represents an integrated product range with stroke lengths of 15 and/or 20 mm. This covers the capacity range from 3 to 1,450 l/h at 100 – 7 bar.

A wide range of power end versions is available for use in areas at risk from explosion with ATEX certification. The Hydro product range is designed to comply with API 675 among others. Its modular construction offers extremely good flexibility in terms of applications

Applications for this product

Oil and gas industry.
Volume-proportional metering of chemicals/additives in the treatment of boiler feed water
Metering of reactants and catalysts in the chemical industry
Level-dependent metering of auxiliary agents in industrial production engineering, for instance hot wax metering in the production of adhesive strips

Features of this product

PTFE multi-layer diaphragm with integral diaphragm rupture warning system
Integral hydraulic relief valve
Metering reproducibility is better than ± 1% in the 20-100% stroke volume range under defined conditions and with proper installation.

Why Choose This Product

The modular construction with single and double head versions permits a wide range of applications, with the double head designs being operated in push-pull mode
It is possible to combine up to 5 metering units, even with different pump capacities, in multiple pump systems
5 different gear ratios are available

Specifications of this product

Capacity range of single head pump: 76 – 1,450 l/h; 40 – 7 bar
Stroke length: 20 mm, Rod force: 5,800 N
Stroke volume adjustment range: 0 – 100%
Stroke volume adjustment: manually by scaled rotary dial (optionally with electric actuator or control drive).
Metering reproducibility is better than ± 1% in the 20 – 100% stroke volume range under defined conditions and with correct installation
PTFE multi-layer diaphragm with electrical diaphragm rupture warning system via a contact
Integrated hydraulic relief and bleed valve
Wetted materials: PVDF, PTFE+25% carbon, stainless steel 1.4571, Hastelloy C.
A wide range of power end versions is available: Three-phase or 1-phase AC motor, motors for use in areas at risk from explosion, different flange designs for use of customer-specific motors
Degree of protection: IP 55
Design in compliance with API 675 among others

To contact ProMinent Australia about Hydraulic Diaphragm Metering Pumps - Hydro/ 4 use Get a quote.

Applications for this product

Oil and gas industry.
Volume-proportional metering of chemicals/additives in the treatment of boiler feed water
Metering of reactants and catalysts in the chemical industry
Level-dependent metering of auxiliary agents in industrial production engineering, for instance hot wax metering in the production of adhesive strips

Features of this product

PTFE multi-layer diaphragm with integral diaphragm rupture warning system
Integral hydraulic relief valve
Metering reproducibility is better than ± 1% in the 20-100% stroke volume range under defined conditions and with proper installation.

Why Choose This Product

The modular construction with single and double head versions permits a wide range of applications, with the double head designs being operated in push-pull mode
It is possible to combine up to 5 metering units, even with different pump capacities, in multiple pump systems
5 different gear ratios are available

Specifications of this product

Capacity range of single head pump: 76 – 1,450 l/h; 40 – 7 bar
Stroke length: 20 mm, Rod force: 5,800 N
Stroke volume adjustment range: 0 – 100%
Stroke volume adjustment: manually by scaled rotary dial (optionally with electric actuator or control drive).
Metering reproducibility is better than ± 1% in the 20 – 100% stroke volume range under defined conditions and with correct installation
PTFE multi-layer diaphragm with electrical diaphragm rupture warning system via a contact
Integrated hydraulic relief and bleed valve
Wetted materials: PVDF, PTFE+25% carbon, stainless steel 1.4571, Hastelloy C.
A wide range of power end versions is available: Three-phase or 1-phase AC motor, motors for use in areas at risk from explosion, different flange designs for use of customer-specific motors
Degree of protection: IP 55
Design in compliance with API 675 among others

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To contact ProMinent Australia about Hydraulic Diaphragm Metering Pumps - Hydro/ 4 use Get a quote.

AI Overview BETA

The Hydro/4 is a hydraulic diaphragm metering pump with an adjustable stroke volume, letting operators set the amount of liquid delivered for dosing. Its PTFE multi-layer diaphragm has an electrical rupture-warning system that signals diaphragm rupture through an electrical contact. In industrial production engineering, operators meter auxiliary agents according to level, including hot wax for making adhesive strips.

Integrated hydraulic relief and bleed valve
ATEX-certified power-end versions are available for areas at risk from explosion
Single-head capacity: 76–1,450 l/h; pressure range: 40–7 bar
20 mm stroke length; 5,800 N rod force
Designed to comply with API 675, among other standards

Source: listing by ProMinent Australia on IndustrySearch · Updated 3 Nov 2026

AI Overview is generated by artificial intelligence and may contain mistakes.

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