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PRESSURE CONTROL
Back pressure regulators UV 4.5 ASME
Standard cast valve

Technical data

Connection NPS 1/2 - 4
Flange PN 150 - 300
PSmax* 4 - 145 psi
Kvs-value 5 - 65 m³/h
Cvs value 6 - 75 US gal/min.
Temperature 266 °F (steam 302 °F)
130 °C (steam 150 °C)
Medium liquid, gases and steam
*RT = -10 °C up to + 50 °C

Description

Self-acting back pressure regulators are simple control valves offering accurate control while being easy to install and maintain. They control the pressure upstream of the valve without requiring pneumatic or electrical control
elements.
The back pressure regulator UV 4.5 ASME is a diaphragm-operated, springloaded and balanced proportional valve for high flow rates. The valve body is
made of cast steel. Diaphragm housing, bonnet and internal parts are made
of stainless steel. The valve cone is fitted with a soft seal.
The inlet pressure to be controlled is balanced across the valve seat by the
force of the valve spring (set pressure). If the inlet pressure rises above the
set pressure, the valve opens. With decreasing inlet pressure the valve control orifice reduces. When the pipeline is depressurised, the valve is closed.
Rotating the adjusting screw clockwise increases the inlet pressure.
The valve requires a sense line (to be installed on-site).
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 V.

Standard

» Body made of cast steel 1.0619 (GS-C25 / A216-WCB)
» Diaphragm housing and closed bonnet made from stainless steel 316L
(1.4404)
» Internal parts made of stainless steel
» Leakage line connection and sealed adjusting screw
» Balanced cone for soft opening and quick closing
» Sense line connection
» EPDM elastomers

Options

» FKM elastomers
» PTFE protection foil for diaphragm

Please specify on order

Example: UV 4.5, DN 50, PN 40, Kvs 30 m³/h, 2 - 5 bar, GP240GH, EPDMTechnical specification