Control systems Pressure reducing/surplussing valves
4
Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2019
TI-P206-01 CTLS Issue 13
DEP4 Cast Steel Excess Pressure Valve
Description The DEP4 is a cast steel direct acting bellows sealed excess pressure valve. The standard version as an EPDM diaphragm (limited to 125 °C) and is suitable for steam and water applications. Also available for oil applications is a Nitrile rubber diaphragm (suffix ' N ' i.e. DEP4B1N which is limited to 90 °C). Note: To protect the actuator diaphragm on steam applications a WS4 water seal pot must be installed in the pressure signal line to the actuator. Refer to TI-S12-03 details. Standards The products listed below comply with the requirements of the European Pressure Equipment Directive (PED) and carry the mark when so required. Certification This product is available with a manufacturers' Typical Test Report and a certifcate of conformity to EN 10204 3.1 as an optional extra. Note: All certification/inspection requirements must be stated at the time of order placement. Available types DN15 - DN100 flanged connections having 6 pressure ranges (suffix 1 - 6). Upstream pressure ranges: Range Valve type Actuator type Spring colour Pressure range (bar) PN rating
4.6 77
DN15 - DN40
DN50 - DN80
DN100
1 2 3 4 5 6
DEP4B1 11 or 11N
Yellow 0.1 - 0.5 0.1 - 0.3 0.1 - 0.3 2.5
DEP4B2 12 or 12N DEP4B3 13 or 13N DEP4B4 14 or 14N DEP4B5 15 or 15N DEP4B6 15 or 15N
Yellow 0.2 - 0.8 0.2 - 0.5 0.2 - 0.5 2.5
Blue 0.5 - 1.7 0.4 - 1.3 0.4 - 1.0
6
Blue 1.4 - 3.4 1.0 - 2.6 0.8 - 2.5
16
Blue 3.2 - 7.5 2.3 - 5.5 2.3 - 5.0
25
Red 7.0 - 16.0 5.0 - 15.0 4.0 - 10.0 25
Sizes and pipe connections DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80 and DN100 Standard flange: EN 1092 PN40 Flanges available on request: ASME 150, ASME 300 and JIS.
K v values Size DN
15
20
25
32
40
50
65
80
100
K v
3.4
6.5
11.4
16.4
24
40
58
92
145
Note: The K v values shown above are full capacities and should be used for safety valve sizing purposes where they are required.
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