Pressure and differential pressure relief controllers consist of a valve and a pressure actuator. Primarily used to limit a pressure (A) or differential pressure (PA)
over a system/substation/pump.
Controllers are normally closed: AV(P)A due to a normally closed valve and AF(P)A due to a stretching spring.
Pressure and differential pressure relief controllers are primarily installed into a bypass. They can be used to enable heat power distribution to other network connections or idle flow in case the connection(s) close(s) completely.
Pressure and differential pressure relief controllers can protect variable flow pumps from overload in the event that flow falls below minimum pump capacity. They relieve pump/application and forward heat power to other connections.
A pressure relief controller can also be installed into the return to maintain a higher desired (static) pressure in the system.
Features and benefits
Relief pump/application and forward heat power to other connections safely
Made for demanding systems, resistant to corrosion, cavitation and dirt
Connected system is protected against pressure surges, fluctuations, cavitation and noise
|Type||Name||Language||Valid for||Updated||Download||File type|
|Data sheet||AFA-VFG2||English||Multiple||14 Oct, 2018||1.1 MB|
|Data sheet||AFD/VFG 2, VFGS 2 (21)||English||Multiple||02 Dec, 2018||2.5 MB|
|Data sheet||AFP/VFG 2 (21)||English||Multiple||14 Oct, 2018||1.5 MB|
|Data sheet||AFPA-VFG2||English||Multiple||14 Oct, 2018||1.0 MB|
|Data sheet||AVA (PN 25)||English||Multiple||13 Apr, 2020||1.4 MB|
|Data sheet||AVPA (PN16, PN25)||English||Multiple||07 Mar, 2018||840.8 KB|
|Data sheet||Differential Pressure Relief Controller AVPA||English||United Kingdom||07 Jun, 2019||964.3 KB|
|Brochure||Improved temperature control and hydronic balance for your benefit||English||Multiple||03 Dec, 2014||612.8 KB|
|Brochure||Let motorized intelligence solve your application challenges||English||Multiple||29 Mar, 2015||3.2 MB|
|Data sheet||Pilot-controlled differential pressure and flow controller PCVPQ||English||Multiple||14 Oct, 2018||1.2 MB|
|Data sheet||Pilot-controlled differential pressure controller PCVP||English||Multiple||14 Oct, 2018||1.0 MB|
|Data sheet||Pilot-controlled differential pressure reducer PCVD||English||Multiple||10 May, 2020||1.2 MB|
|Data sheet||Pilot-controlled flow controller PCVQ||English||Multiple||14 Oct, 2018||958.4 KB|
|Brochure||Save energy with efficient and safe steam distribution||English||Multiple||11 Jul, 2016||1.2 MB|
|Brochure||Track down and solve any hydronic imbalance with self acting controls||English||Multiple||29 Mar, 2015||14.7 MB|
|Data sheet||VFG / VFGS /VFU Valves||English||Multiple||14 Oct, 2018||1.2 MB|
Tools and apps
Yes you can. Open the control valve fully and set the max flow by adjusting the differential pressure. You can also calculate the appropriate differential pressure, but you need to know the exact capacity of the control valve.
We produce valves with a standard length. You can also find the measures in our datasheet or download 2D and 3D CAD drawing models from our product presentations. Please go to our product catalog where you will find links to documentation and drawings - follow the below link.
Do not stop turning the setting nut when the shaft hides into it. There is still round 100 mm stroke to do.
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