Flow Balancing Valve Cartridges

Application

PREN AR Cartridges is used in heating and cooling systems for the distribution of flow in various sections of the system. The dynamic balancing valve ensures easy and reliable balancing of the system, regardless of any fluctations in the differential pressure of the system. PREN AR Cartridges limits maximum flow in the system, and ensures the most economical operation.

Can be used in both variable and constant flow systems. From small size valves (DN15) to big wafer types (DN800), from small heating units to sea-water district cooling applications, there is a PREN AR Cartridge that guarantee the specified flow.

Benefits

> Quick and easy selection as only flow data are required.
> Security that the specified flow will not be exceeded.
> Easy to install according to pre-defined flow.
> Minimized commissioning time due to automatic balancing of the system.
> High comfort for the end-users due to right balance of the hydraulic system.
> The valves automatically find the hydraulic balance regardless of pressure fluctations in the system.
> No main circuit or branch balancing valves needed in the system.
> Improved response to water hammer due to the chock absorption by the rubber diaphragm of the cartridge.

Features

> Removable cartridge solution simplifies flushing procedure
> No minimum straight pipe lengths required before or after the valve.
> Built-in optional P/T plugs for needle system.
> Minimized friction and noise due to the patented cartridge design based on the metal-rubber diaphragm- metal contact.

The following applies to all flow control valves:
Q = kV * √p
Q = Flow (m3/h)
kV = Opening area
p = Differential pressure (Bar)
The PREN AR cartridges, react to pressure fluctuations so that the differential pressure across the pre-adjustment unit is kept constant. In that way a max. flow limit is ensured in accordance with the design.

Cartridge Material: DZR Brass CW602N (Low pressure cartridges)
DZR Brass CW 602N Tin/nickel plated (High pressure cartridges)
AISI 304 or AISI 316 (Wafer cartridges)
O-rings: EPDM 281
Spring: Stainless Steel 1.4310 (Low pressure & High pressure cartridges)
AISI 316 (Wafer cartridges)
Diaphragm: HNBR (Low pressure cartridges)
HNBR reinforced (High pressure cartridges)
Medium Temperature: -20 to + 1200°C

High pressure cartridges

DN15 - DN50:

The cartridge (for automatic balancing valve) should be made of tin/nickel plated brass; There should be only one differential pressure control range up to 600kPa; The flow rate should be defined by replaceable orifice plate. The diaphragm should be made of reinforced HNBR, the O-rings should be made of EPDM.

Low pressure cartridges

DN15 - DN50:

The cartridge (for automatic balancing valve) should be made of brass; There should be only one differential pressure control range up to 350kPa; The flow rate should be defined by replaceable orifice plate. The diaphragm should be made of HNBR; the O-rings should be made of EPDM. umber. The cartridge can be identified by means of this number and the corresponding flow rate can be read from the above flow rate tables.

High pressure cartridges

DN50 - DN800:

The cartridge for automatic balancing valve (flanged housing) should be made of stainless steel; There should be only one differential pressure control range up to 600kPa; The flow rate should be defined by replaceable orifice plate. The diaphragm should be made of reinforced HNBR, the O-rings should be made of EPDM.