Description
Grundfos DMH hydraulic piston diaphragm dosing pump
Perfect material selection – for housing and liquid-wetted parts
The DMH models have a robust cast-aluminium housing with epoxy coating to meet all application needs (grey cast-iron if API 675 is required). Investment costs and running costs for spare parts are kept low over the years: A wide choice of materials for dosing head, valves and accessories allow selecting exactly the degree of chemical resistance required. All liquid-wetted parts need to be resistant to the chemicals used. The diaphragm is made of full-PTFE material.
Safe and trouble-free operation
The serially integrated pressure relief valve and active diaphragm protection system (AMS) keep the pump and entire system protected against overpressure, if the discharge line is blocked. In addition, the degassing valve at the pump guarantees high functional safety of the pump, the installation and the whole process. Due to aluminium enclosure and the piston diaphragm technology, DMH pumps have a very long operating life and long service intervals.
Power plants
Dosing of various chemicals in all stages in a power plant:
For boiler feed water, treatment of cooling water and process water (raw water purification, chemicals for ion-exchangers, supplementary water treatment, effluent water neutralization).
Dosing of ammonia, hydrazine, phosphates in high-pressure areas (boiler feed water).
Petrochemical/oil & gas industry, refinery
Dosing of chemicals in process areas around the production of oil and gas (apart from drilling hole, platform):
Dosing of chemicals for treatment of cleaning water and process water
Dosing of wax as lubricant in oil-pipelines
Dosing of inhibitors and anticorrosion chemicals to protect oil pipelines
Dosing of additives and catalysts
Odorisation of gas because of safety aspects in case of leakages
Treatment of process water and drinking water
Rough environments (hot climate, desert, outdoor installations)
Higher flow and pressure ratings
EX zones
ATEX Directive (94/9/EC), Group II, category 2 (zone 1/21) and
ATEX Directive (94/9/EC), Group II, category 3 (zone 2/22)
Dosing of flammable liquids
Dosing of alcohol or methanol in wastewater treatment
Cleaning of kerosene and petrol in mechanical engineering and airport areas
Dosing of ethanol and methanol
Dosing of food-grade alcohol for disinfection in meat and bread packaging
