Pipeline ancillaries

Vacuum breakers

Steam

saturation

curve

7.13.1

TI-P019-02

ST Issue 8

Description

VB14 and VB21

Vacuum Breakers

VB14

The VB14 is a small purpose designed vacuum breaker for general

purpose applications on condensing vapour (steam) or liquid systems.

Standards

This product fully complies with the requirements of the European

Pressure Equipment Directive 97/23/EC.

Certification

This product is available with a manufacturer's Typical Test Report.

Note: All certification/inspection requirements must be stated at

the time of order placement.

Sizes and pipe connections

1⁄2" (system connection) screwed BSP or NPT.

" (air inlet connection) screwed BSP or NPT.

Pressure/temperature limits

������

������

������

������

����

��

1

2

5

3

4

CU ZN 39 PB2

Z 100 CD 17

Z15 CN 16 02

CU ZN 39 PB2

AISI 304

��

��

��

��

��

����

����

����

����

Pressure bar g

The product must not be used in this region.

Body design conditions

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

PN16

16 bar g @ 180°C

260°C @ 7 bar g

-196°C

14 bar g

260°C @ 7 bar g

Materials

No.

Part

1

Cap

2

Valve

3

Valve seat

4

Body

Material

Brass

Stainless steel

Stainless steel

Brass

Stainless steel

0°C

Note: For lower operating temperatures consult Spirax Sarco

5

Gasket

Capacity Dp required to open vacuum breaker 4.6 mm Hg

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

��

��

��

������

������

������

������

������

Dp (mm Hg)

Example: 1 off Spirax Sarco VB14 vacuum breaker having 1⁄2"

screwed BSP connections.

Dimensions / weight

(approximate) in mm and kg

B

C

Size A

1⁄2"

55

B (A/F)

C

34

34

Kv Weight

0.52

0.35

A

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-P019-05) supplied with the product.

Installation note:

The VB14 vacuum breaker must be installed in a vertical position

with the system connection at the bottom. On steam systems, the

vacuum breaker should be installed at the highest point in the system

where it will not be flooded with condensate.

�������� ���� ����

������

������

������������������

How to order

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 2011

F

l

o

w

d

m

3

/

s

T

e

m

p

e

r

a

t

u

r

e

°

C