7.6.13

A

B

C

E

Steam

saturation

curve

Pipeline ancillaries

Disc, split disc and wafer check valves

DCV8

Disc Check Valve

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 2013

TI-P601-01

ST Issue 11

Description

DCV8 disc check valves are of a wafer pattern, designed to be

sandwiched between DIN 2501 and EN 1092 flanges. Their

function is to prevent reverse flow on a wide variety of fluids. The

DCV8 is designed for use with agressive fluids, vapours, acids and

alkalines at high pressures and temperatures. The valves are

provided with an M8 threaded tapping for product earthing and

conform to EN 558 part 1, series 49.

Optional extras

Heavy duty springs (700 mbar opening pressure, up to DN65)

for boiler feed applications

High temperature springs

Viton soft seats for oils and gas applications

EPM soft seats for water applications

Standards

Designed and manufactured in accordance with

ÄD Merkblatter.

This product fully complies with the requirements of the European

Pressure Equipment Directive 97 / 23 / EC.

Standard shut-off

Standard valves conform to EN 122 66-1 rate D.

Soft seated versions meet EN 12266-1 rate A, providing a

differential pressure exists.

Certification

These products are available with certification to EN 10204 3.1.

and the body is sourced from a TÜV approved foundry.

Note: All certification/inspection requirements must be stated

at the time of order placement.

Sizes and pipe connections

DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80 and DN100

Suitable for installation between the following flanges:

EN 1092 / DIN 2501 PN10, PN16, PN25 and PN40.

4

3

2

1

Pressure / temperature limits

400

300

200

100

0

-196

0

5

10

15

20

25

30

35

40

Pressure bar g

Materials

No. Part

1 Body

2 Disc

3 Spring retainer

Standard spring

4 Heavy duty spring

High temp.spring

Operation

Material

Austenitic stainless steel

Austenitic stainless steel

Austenitic stainless steel

Austenitic stainless steel

Austenitic stainless steel

Nickel alloy

WS 1.4408

ASTM A276 316

BS 1449 316 S 11

BS 2056 316 S 42

BS 2056 316 S 42

Nimonic 90

The product must not be used in this region.

For use in this area use a DCV8 with high temperature

spring or DCV8 without spring.

A-B-D Without standard or high temperature springs.

E-C-D Standard spring and heavy duty spring.

Please note: Special testing to allow lower temperature operation

Disc check valves are opened by the pressure of the fluid and

closed by the spring as soon as the flow ceases and before the

reverse flow occurs.

Open

Closed

can be provided at extra cost. Consult Spirax Sarco.

Body design conditions

PN40

40 barg @ 50°C

400°C @ 25.6 barg

-196°C

40 bar g @ 50°C

300°C @ 27.6 bar g

300°C @ 27.6 bar g

400°C @ 25.6 bar g

400°C @ 25.6 bar g

-196°C

-25°C to +205°C

-40°C to +120°C

Designed for a maximum cold hydraulic test pressure of 60 bar g

PMA Maximum allowable pressure

TMA Maximum allowable temperature

Minimum allowable temperature

PMO Maximum operating pressure (bar g)

Maximum

Standard spring

TMO operating

Heavy duty spring

temperature

High temperature spring

Without spring

Minimum operating temperature (standard disc)

Temperature limits

Viton seat

EPDM seat

D

T

e

m

p

e

r

a

t

u

r

e

°

C

c

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