Mode Of Operation - SPX FLOW APV DELTA RG4 Instruction Manual

APV
APV_RG4_ATEX_UK-0_032018.indd
Modulating Valve
DELTA RG4-ATEX
Instruction Manual: UK-0
5. Mode of Operation
- Depending on the specific requirement, the modulating valve can be
operated either with spring opening or with spring closing function.
MFS - diaphragm actuator, spring closing
The actuator opens by actuating pressure and closes by spring
pressure.
MFH - diaphragm actuator, spring opening.
The actuator closes by actuating pressure and opens by
spring pressure.
For the various applications, the diaphragm actuators are supplied
with different diaphragm surfaces and different actuating pressures.
In its standard design, the valve positioner is a electro-pneumatic
transformer. A pneumatic valve positioner (control signal 0.2-1.0
bar) is also available for specific operations.
The direction of flows transferred can be
rising (directional equality >>) or falling (directional reverse <>).
Positioner IP3730-11
Installation and instruction manual of electro-pneumatic positioner
IP3730-11
see http://www.samson.de / English / Search (EB 8384-1)
- The positioner is installed laterally at the diaphragm actuator.
Fedback of the valve position is undertaken by mechanical pick-off
below the diaphragm actuator.
UK
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