Spirax Sarco - Catalogo Agosto 2017

Pipeline ancillaries

Local regulations may restrict the use of this product to below the conditions quoted.

Disc, split disc and wafer check valves

TI-P601-18

ST Issue 8

DCV41

Austenitic Stainless Steel

Disc Check Valve

Description

The DCV41 is an austenitic stainless steel disc check valve available with either screwed or socket weld end connections. Its function is

to prevent reverse flow on a wide variety of fluids for applications in process lines, hot water systems, steam and condensate systems.

For oil and gas applications, a Viton seat is available.

For water applications an EPDM seat is available.

Soft seat versions provide a zero leakage rate or bubble tight shut-off, i.e. they meet EN 12266-1 Rate A, providing a differential pressure

exists. Please note that the soft seat options are not available with socket weld ends.

The shut-off of the standard valve conforms to EN 12266-1 Rate E.

When a heavy duty spring is installed with an EPDM seat, the valve is suitable for boiler feedwater check applications.

A high temperature spring version is available to operate at 400 °C.

Optional extras

Heavy duty springs (700 mbar opening pressure) for boiler feed

applications

High temperature springs

Viton soft seats for oils and gas applications - screwed only

EPDM soft seats for water applications - screwed only

Standards

Designed and manufactured in accordance with BS 7438.

This product fully complies with the requirements of the European

Pressure Equipment Directive 97 / 23 / EC.

Standard shut-off

Standard valves conform to EN 12266-1 rate E.

Soft seated versions meet EN 2266-1 rate A, providing a differential

pressure exists.

Certification

This product is available with certification to EN 10204 3.1.

Note: All certification / inspection requirements must be stated at

the time of order placement.

Standard DCV41

with metal seat

Sizes and pipe connections

1⁄2", 3⁄4" and 1"

Screwed BSP to BS 21 female parallel,

Screwed NPT to ASME B 1.20.1 and

Socket weld to ASME B 16.11 Class 3000.

Materials

No. Part

1 Body

2 Seat

3 Disc

Standard spring

4 Heavy duty spring

Operation

Soft seat option

(screwed

connections only)

Material

Austenitic stainless steel

Nickel alloy

ASTM A351 CF3M

ASTM A276 316

BS 2056 316 S42

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.

High temp. spring

Nimonic 90

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