UV-3.90 pages

UV 3.9

Pressure Control Valves
Overflow valve for liquids and gases
up to 130 °C
Technical Data
Connection

G 1/2 - 2
DN 15 - 50
Nominal Pressure PN 1 - 2.5
Inlet Pressure
up to 0.01 - 1.1 bar
in 6 setting ranges
0.2 - 28 m3/h
Kvs-value
acc. VDI/VDE-guideline 2174
Tightness
(leakage rate K 0.05 % of Kvs-value)

setting screw

Description
Medium-controlled overflow valves 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.

spring module
The UV 3.9 overflow valve is a spring-loaded diaphragm-controlled proportional control valve designed for very low inlet pressures. This bypass valve is manufactured from deep-drawn stainless
steel featuring excellent corrosion resistance. The valve cone can
be fitted with a soft or metallic seal.
The inlet pressure to be controlled is balanced across the seat by
the force of the valve spring (set pressure). When the inlet pressure falls below the pressure set using the setting spindle, the valve
cone moves towards the seat and the volume of medium is reduced. When the inlet pressure rises the valve control orifice increases; when the pipeline is depressurised the valve is closed. Rotating the setting spindle clockwise increases the inlet pressure.

body
with valve

The UV 3.9 overflow valve does not require a pilot line.

STANDARD EQUIPMENT
• All stainless steel construction

Kvs-values [m3/h]
0.2

0.9

2.2

3.9

6

12

18

28

Sheet no. UV 3.9/2.1.041.1 - issue 26.04.2004

OPTIONS
• For toxic or hazardous media: sealed spring cover complete
with leakage line connection (incl. sealed setting spindle).
Must be installed with a leakage line capable of draining
leaking medium safely and without pressure
• Various diaphragm and seal materials suitable for your medium
• Special connections: Aseptic, ANSI or DIN flanges,
welding spigots; other connections on request
• Special versions on request
Operating instructions, Know How and Safety instructions must be
observed.

Setting Ranges [bar] and Nominal Pressure
setting range bar

nominal pressure

0.01 - 0.025
0.02 - 0.06
0.05 - 0.12

PN 1

0.10 - 0.25
0.2 - 0.5
0.4 - 1.1

PN 2.5

We reserve the right to alter technical specifications without notice.

Pressure Tech 2000 Limited • Unit 6, Graphite Way, Hadfield, Glossop, Derbyshire SK13 1QG - GB • Tel. +44-1457-899307 • Fax +44-1457-899308