VAL
S
TEAM
ADCA
Produced in accordance with Sound Engineering Practices of the European PED - Pressure Equipment Directive.
IMI PS130.08 E 00.22
9
downstream pressure (P2).
Clockwise rotation of the adjustment knob (26) allows setting of the desired set pressure,
by compressing the adjustment spring (21) and increases the loading force FL. When
the loading force exceeds the counteracting force Fs, the valve closes.
When upstream pressure (P1) rises, the force it applies on the lower side of the diaphragm
increases. The valve opens as a result, exhausting the excess pressure above the set
point after which the plug will reseat and the valve will close once again.
A pressure sustaining valve is not a shut-off device and as such there is
almost always a small amount of leakage between seat and plug. For this
reason, a shut-off valve should be used downstream of the regulator when
isolation is required.
NOTE
A pressure sustaining valve is not by any means a safety relief valve. A safety
relief valve is a safety device designed to protect system and personnel
from overpressure via rapid exhaust of pressure as it “pops-up” wide open.
A pressure sustaining valve on the other hand senses upstream pressure
changes and reacts porportionally by closing or opening.
NOTE
2.2. Certification
This product has been specifically designed for use with liquids and gases which are
in Group 2 of the European PED – 2014/68/EU Pressure Equipment Directive and it
complies with its requirements.
PS130 – CE MARKING – GROUP 2 (PED – European Directive)
PN 16
Category
All sizes
SEP
If the product falls within category SEP it must not be CE marked, unless
other directives are applicable.
NOTE
This product is not in the scope of the ATEX 2014/34/EU directive as it does not have its
own potential ignition source. Personnel responsible for the plant installation must assess
the risks caused by static electricity and take the necessary precautionary measures to
prevent static charge. These measures include e.g. connection of the product to the
equipotential bonding system.
