- Van Giám Áp SAV 820E
- Model: SAV 820E
- Hãng: MANKENBERG
Kết Nối DN: 40 - 150
Áp suất danh nghĩa PN: lên đến 160
Áp suất : 10 - 70 bar
Kvs value : 20 - 250 m³/h
Nhiệt độ: -30 đến 130 °C-
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Pressure control valves
Surge relief valves SAV 820E
Surge anticipation valve
Technical Data
Connection DN 40 - 150
Nominal pressure PN up to 160
Set pressure 10 - 70 bar
Outlet pressure Relief line, unpressurized
Kvs value 20 - 250 m³/h
Temperature -30 up to 130 °C
Medium liquids
Description
Surge relief valves are used for the decay of pressure surges and of
permanent overpressures within pipeline systems.
Designed for installation in a bypass line, the SAV820E prevents harmful
pressure surges that can develop in pumping systems during sudden
pump stoppage. Unlike conventional pressure relief valves that open
only when a high-pressure surge is encountered, the SAV820E already
senses the preliminary stage of the high-pressure surge (pump failure or
low-pressure surge) and opens in anticipation of the subsequently
returning high-pressure surge. By pre-opening, the SAV820E inhibits the
pressure rise before it occurs.
The SAV820E is a self-acting valve with two adjustable* response
pressures and adjustable closing behavior. It consists of the main valve
with two adjustable pilot valves and a throttle valve. It operates without
auxiliary or external energy.
When the upper or lower response pressure is reached, the valve opens.
At a pressure between the response pressures, the valve remains closed.
These valves are no shut-off elements ensuring a tight closing of the
valve. In accordance with DIN EN 60534-4 and/or ANSI FCI 70-2 they
may feature a leakage rate in closed position in compliance with the
leakage classes III or V, optional IV.
Standard
» Completely made of stainless steel
» ANSI or EN flanges
» Transport lugs
» Manometer
Options
» Special material such as Duplex steel
» Different materials for O-rings and gaskets, suitable for your medium
» Special connections
» Filter in the sense line
» Customized special versions on request, such as
- straightway valve
- control by solenoid valve
- diaphragm-operated
- dome-loaded
Operating instructions and safety instructions must be observed. All the
pressure has always been indicated as overpressure. We reserve the right
to alter technical specifications without notice.
| Kvs values [m3/h] | |||||||
| nominal diameter DN | 40 | 50 | 65 | 80 | 100 | 125 | 150 |
| Kvs value m3/h | 20 | 32 | 50 | 60 | 70 | 150 | 250 |
| Adjustable response pressures [bar] | |
| PV-LP opens below | 10 - 50 bar |
| PV-HP opens above | 50 - 70 bar |
Schematic layout
| P1 | Pressure display | NV | Needle valve |
| P2 | Pressure display | K1A | 2-way ball valve |
| PL | Pressure display | K1B | 2-way ball valve |
| PZ | Pressure display | K2 | ball valve |
| PV-LP | Low pressure pilot valve | D1 | Throttle valve |
| PV-HP | High pressure pilot valve |
