Spirax Sarco - Catalogo Agosto 2017

7.6.1

Steam

saturation

curve

Pipeline ancillaries

Disc, split disc and wafer check valves

DCV1

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.

TI-P134-05

ST Issue 9

Description

The DCV1 disc check valve is of the wafer pattern designed to

be sandwiched between flanges. It is suitable for use on a wide

range of fluids for applications in process lines, hot water systems,

steam and condensate systems etc. Face-to-face dimensions

conform to EN 558 part 1, series 49.

As standard it will be supplied with a metal-to-metal seat

for use on steam applications. Where it is being used on oil, air,

gas and water applications, alternative seat material is available -

see 'Optional extras'.

Note: Wafer check valves are not suitable for use where heavily

pulsating flow exists, such as close to a compressor

Optional extras

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

for boiler feed applications.

Viton soft seats for oil, air and gas applications.

EPDM soft seats for water applications.

Standards

This product fully complies with the requirements of the

European Pressure Equipment Directive 97/23/EC.

Standard valves conform to EN 12266-1 rate E.

Valves conforming to EN 12266-1 rate D are available on request.

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

differential pressure exists.

This product is available with a manufacturers Typical Test Report.

Note: Allcertification/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 BS 10 Tables 'E' and 'H',

EN 1092 PN6, PN10, PN16, PN25, PN40;

JIS 5, JIS 10, JIS 16, and JIS 20 flanges with the following

exceptions:-

Pressure / temperature limits

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Standard shut-off

Certification

Note 1: DN40, DN50, DN80 and DN100 - will not fit between JIS 5

flanges.

Note 2: DN65 and DN80 - will not fit between BS 10 'E' flanges.

Materials

No. Part

1 Body

2 Disc

3 Spring retainer

Standard spring

Heavy duty spring

Material

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Pressure bar g

The product must not be used in this region.

Please note: The figures displayed are only relevant when a

metal-to-metal seat is used. If Viton or EPDM seats are used the

product is restricted to the limits of the seat material chosen.

Body design conditions for saturated steam service

PN16

Bronze

Austenitic stainless steel

Austenitic stainless steel BS 2056 316 S42

WS 2.1050

ASTM A276 316

BS 1449 316 S11

BS 2056 316 S42

Operation

PMA Maximum allowable pressure

TMA Maximum allowable temperature

Minimum allowable temperature

PMO

Maximum operating pressure

for saturated steam service

TMO Maximum operating temperature

Minimum operating temperature

16 bar g @ 120°C

260°C @ 7 bar g

-198°C

13.2 bar g @ 196°C

260°C @ 7 bar g

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

-198°C

Note: For lower operating temperatures consult Spirax Sarco

Viton seat

-25°C to +205°C

Temperature limits

Designed for a maximum cold hydraulic test pressure of 24 bar g

EPDM seat

-40°C to +120°C