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A leading provider of products and services across offshore & shipbuilding and petrochemical industries.
- New Products
- Ball Valves
- Butterfly Valves
- Gate Globe Check Valves
- On-off Valves
- Cryogenic Valves
- Safety Valves
- Control Valves
- Steam Trapping
- Instrumentation Valves
- Oil Equipments
- Corrosion Resistant Valves
- Marine Valve
- Special Valve
- Special Material
- Systems
Compact design
Construction without pillars
Exact and easy adjustment
Diameter independent ranges
Simple change of spring and actuator
5 exchangeable actuator sizes
3 exchangeable spring sizes
Pressure balanced by stainless steel bellow
Spindle sealing via stainless steel bellow
Secondary stem sealing(optional)
Tapered seat ring
Screwed seat ring
KVS-values reduce able
Flow divider for noise reduction(optional)
Plug with PTFE soft sealing(optional)
Main Parameters
Nominal diameter: DN15 – 150
Nominal pressure: PN16-40
Valve material: EN-JL1040,EN-JS1049,1.0619+N
Connection: Flange
Fluid medium: Neutral Liquids, Steam and Hot Water
Model Category
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ARI-PREDEX Direct acting proportional self-operated excess pressure regulator
1)The excess pressure regulator is a self operated, direct acting proportional regulator, which regulates the upstream pressure.
2)The upstream pressure (p1) is regulated, this means, the valve opens when the upstream pressure rises over an adjusted set point. If the upstream pressure decreases under the adjusted set point, the valve closes automatically. Because of the stainless steel bellows, the downstream pressure (p2) has no influence.
3)Operating fields are to regulate fluids of the group II acc. to Pressure Equipment Directive 2014/68/EU, e.g. steam, neutral gases, vapours and liquids. With steam and liquids, having temperatures higher than the allowable working temperatures a water seal pot must be installed in the control line (to protect actuator diaphragm).
Picture Show
PREDEX Installation in the control line can be seen in the system drawing
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