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DBB3 Double Block and Bleed Bellows Sealed Stop Valve

Overview

The Spirax SafeBlocTM is a double isolation solution, with a unique space-saving design, offering reduced installation time and fewer leak paths.

Faster and easier to install than a traditional double block and bleed assembly, the Spirax SafeblocTM has an innovative design which incorporates two bellows sealed isolation valves and a bleed port in one compact assembly.

Easy to use and commission, the Spirax SafeblocTM can be installed without pipework modifications, into the space left by an existing single isolation valve.

Technical Illustration

DBB3 Double Block and Bleed Bellows Sealed Stop Valve

The Spirax SafeBlocTM offers double isolation in the space of one valve, quick and easy installation and zero leakage.

Technical Information

Size and pipe connections

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

Flanged EN 1092 PN40 or ANSI B 16.5 Class 300.

Face-to-face dimensions conform to BS EN 558:2008.

 

Pressure/temperature limits (ISO 6552) PN40

Body design conditions

PN40

PMA Maximum allowable pressure

40 bar g @ 0 °C

TMA Maximum allowable temperature

400 °C @ 24 bar g

Minimum allowable temperature

-10 °C

PMO Maximum operating pressure for saturated steam service

30.4 bar g

TMO Maximum operating temperature

400 °C @ 24 bar g

Minimum operating temperature (Note: For lower operating temperatures consult Spirax Sarco)

-10 °C

Designed for a maximum cold hydraulic test pressure of:

60 bar g

 

ANSI 300

Body design conditions

ANSI 300

PMA Maximum allowable pressure

51 bar g @ 37.7 °C

TMA Maximum allowable temperature

425 °C @ 28 bar g

Minimum allowable temperature

-29 °C

PMO Maximum operating pressure for saturated steam service

41.6 bar g

TMO Maximum operating temperature

425 °C @ 28 bar g

Minimum operating temperature (Note: For lower operating temperatures consult Spirax Sarco)

-29 °C

Designed for a maximum cold hydraulic test pressure of:

77 bar g


Typical Installation

Technical Documentation

Title

Spirax SafeBloc DBB3 Double Block and Bleed Bellows Sealed Stop Valve

language

English

reference number

TI-P184-08

Download

Download PDF

Installation Documentation

Title

Spirax SafeBloc DBB3 Double Block and Bleed Bellows Sealed Stop Valve

language

English

reference number

IM-P184-09

Download

Download PDF

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+47 67 06 76 80

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