HYDROSTAB® upstream - Series K1 20 or K1 21


HYDROSTAB® Pressure sustaining valve is an automatic control valve with 2 functions:

  • Maintaining a minimum upstream pressure (in-line installation)
    • Ensures a minimum pressure at a high point or towards a disadvantaged connection.
    • Prevent too great a drop in pressure when supplying a reservoir and spread out reservoir filling over time.
    • Maintain a minimum pressure on a pump and consequently limit the flow rate to prevent it from working in a cavitation zone. (to be checked according to the pump curve),
  • Relief valve (installed as a pipe by-pass) to cut off any pressure in a network above its set value, towards another network, a tank or an atmospheric discharge.
    • Prevent over pressure in a network when a shut-off device is closed.
    • Ensure a minimum flow rate at the outlet of a pump to protect it from operating at too low a flow rate.

Applications :

  • Water distribution networks
  • Irrigation networks

Product benefits :

HYDROBLOC® PREMIUM valves give you :

  • Exceptional sensitivity and control accuracy
  • A wider operating range, in complete safety, thanks to the standard SPD device.
  • Longer service life thanks to the extensive use of 316 stainless steel.
  • Easy installation and maintenance, thanks to the position indicator, the included pressure gauges and the tap with ergonomic lever.

Range :

  • DN50 to 400 HYDROBLOC® PREMIUM range
  • DN500 to 1000 HYDROBLOC® range
  • PFA 16 or 25

Technical data :

  • ISO PN drilled flanges according to PFA (EN 1092-2 et ISO 7005-2 standards)
  • Working temperature : +0°C to +65°C.
  • Face-to-face dimensions to EN 558-1.
  • Sealing : Class A to standard ISO 5208-2.
  • Watertight at zero flow.
  • Supplied with position indicator.
  • Opening/closing speed controller
  • Reduced bore main valve (XGS) or full bore (XG)
  • NF EN 1074-5.
  • Possible settings from 1 to 4 m/s
  • Maximum differential pressure 10 bar
  • Pre-set in factory : setting value to be specified on placing the order

Norms and certifications :

  • ACS
  • WRAS on components 
  • DVGW on components

Alternatives and options :

Guarantee :

  • 5 years

Download product brochure

Download installation manual

Download maintenance manual

Download CAD Library

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