DBB3 Double Block and Bleed Bellows Sealed Stop Valve

Masthead background

Explore Products in this category

Back to Bellows Sealed Stop Valves

Overview

The Spirax SafeBloc^TM 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 Safebloc^TM 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 Safebloc^TM can be installed without pipework modifications, into the space left by an existing single isolation valve.

DBB3 DBB3 DBB3 DBB3

Technical Illustration

DBB3 Double Block and Bleed Bellows Sealed Stop Valve

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

Tech promo DBB3

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

DBB3

Title

Spirax SafeBloc DBB3 Double Block and Bleed Bellows Sealed Stop Valve

language

English

reference number

TI-P184-08

Download

document	language	reference number	download
Spirax SafeBloc DBB3 Double Block and Bleed Bellows Sealed Stop Valve	English	IM-P184-09	Download PDF
Spirax SafeBlocTM DBB3 Double Block and Bleed Bellows Sealed Stop Valve	English	IM-P184-09	Download PDF