ZM-R25 - ZIMMERLI MESSTECHNIK AG

ZMR15_25

Product type

Low pressure, differential pressure, vacuum

Product category:

Pressure reduction valve

Medium:

Liquids, gases

Material:

Stainless steel, Hastelloy

Industrial requirements:

ATEX, CE, FDA, PED, Oil and grease free

Temperature

-20 bis 180 °C

Pressure range P1 [bar]:

0.5 up to 10

Pressure range P1 [psi]:

7.25 up to 145

Pressure range P2 [bar]:

-0.2 bar up to 2.5 bar

Pressure range P2 [psi]:

-14.5 up to 29

Nominal diameter

DN25

Product Data Sheet

ZIMMERLI controllers stand for process safety, environmental protection, minimal environmental emissions and careful use of resources. Low pressure regulators for inerting and for protective gas blanketing from ZIMMERLI MESSTECHNIK regulate the pressure automatically, highly precisely and without auxiliary energy. In addition to protective and inert gases for isolating processes from atmospheric oxygen, pure liquids can also be controlled.

ZIMMERLI pressure regulators take environmental protection seriously ZIMMERLI low-pressure regulators prevent process gases from entering the atmosphere in undesirable quantities and thus make an important contribution to environmental protection. Consequently, these devices are mainly used in the chemical, petrochemical, pharmaceutical, cosmetics and food industries for inerting and blanketing process liquids with protective gases between -1000 and +2500 mbar.
Inert gases have an inerting or insulating effect and usually consist of nitrogen (N2). Oxygen in the air would pose a dangerous or permanent explosion hazard in processes involving hydrocarbons, for example. Oxygen and humidity in other processes could lead to oxidation and as a result adversely affect the final product.

Differential pressure regulators reduce inert gas consumption All ZIMMERLI low pressure regulators are essentially differential pressure regulators which keep the overpressure (differential pressure) in a process constant on the basis of atmospheric pressure. constant. Regulator combinations are available for positive pressure, dome pressure, negative pressure and dynamic pressure superimposition. and dynamic pressure superposition. Due to the coordinated control behaviour between the reducing valve and the overflow valve, the consumption of shielding gas can be by up to 90 percent.
Modern tanks, centrifuges, process or storage vessels are usually equipped with two ZIMMERLI regulators. One device serves as a pressure reducer (inert gas feed) and the second device serves as an overflow device (pressure maintenance device). The design of the two devices is chosen in such a way that the maximum possible filling and emptying speed of the process liquid is reliably controlled while the desired inert gas pressure relative to the atmosphere is always kept constant. The superposition can be realised both in the overpressure and in the underpressure range.

Hydrostatic pump effect In addition to pure inerting, dynamic pressure superimposition can be used to pump high-purity liquids without contact or gaps (hydrostatic pump). The dynamic pressure control between -1000 and +2500 mbar is carried out either manually via corresponding pilot controllers or computer-controlled and for the Ex-area in intrinsic safety. Depending on the requirements, ZIMMERLI low-pressure regulators are available in stainless steel 1.4571, Hastelloy C or plastic.
This results in almost unlimited application possibilities in terms of long-term stability and chemical resistance on storage tanks, reactors, process vessels, centrifuges and nutsches.
The same regulators can be used not only for nitrogen but also for other gases such as natural gas, methane gas, biogas, hydrogen or pure liquids. All regulators made of metal are alternatively available with ATEX approval. Fields of application are for example: Inerting, tank ventilation, pressure maintenance, vacuum breaking, hydrostatic pump, explosion protection, environmental protection, air pollution control and personal protection.

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