Injection and Sampling Valve Variants0 pages

INJECTION QUILLS AND SAMPLING
PROBES FOR DBB VALVES

In most modern applications there is often a requirement to take
a sample of the process fluid or inject a particular chemical
directly into the process stream at full operating pressures and
temperatures.
To meet this requirement then any of the Budenberg ranges of
Double Block & Bleed Valves including type 98 one piece, MV
Modular type or Monoflanges can be fitted with either an
Injection Quill or Sampling Probe whilst retaining the wide choice
of options available in each range.
Probes and Quills extend into the process medium and are
designed to meet the individual application requirements. Units
can be fitted with an integral check valve to prevent back flow
into the process stream.

Injection Quills
In many applications there is a need to inject chemicals such as
de-waxing, de-icing or de-foaming agents into the process stream
to facilitate a free flow of the process media.
Using the primary and secondary isolation valves the required
chemical is injected directly into the process stream. It is usual
for Injection Valves to be fitted with a non return check valve
that only opens when chemicals are injected into the process
line thus preventing back flow out of the process stream.

Construction
Probes / Quills can be manufactured in several ways to suit the
users requirement:
* The outlet flange and the probe can be made from a single
one piece forging or from forged barstock
* The Quill / probe is manufactured from forged barstock which
is then screwed and torqued into the outlet flange. If required
the probe can also be seam welded to provide added strength.
* The Quill / Probe can be socket welded into the outlet flange

Sampling Probes
Typically the need would be to allow a small process sample to
be removed for evaluation under full system pressure.

Dimensions
The overall quill length, defined in mm from the tip to directly
below the flange face and pipe schedule of the quill are user
definable. Units can be fitted with velocity or support collars
dependant upon the required design.

Usually this is achieved by opening and closing of the primary
isolation valve thus trapping a sample of the process fluid
between the primary and secondary isolation valves. Using the
Vent valve this sample can then be safely vented off at reduced
pressure.

Bore
Bore sizes are determined by the through bore of the DBB valve
that have 10mm, 14mm or 20mm as standard

Alternatively if larger samples are required then this can be
achieved by use of the primary and secondary isolation valves
with an optional Non Return Check Valve being fitted to prevent
back flow into the process stream.
Non Return Valve
A high integrity full bore non-return valve, that can be fitted
internally or externally, eliminates the risk of back flow into or
out of the process stream. The design uses a spring loaded
poppet to ensure leak proof performance and has a standard
cracking pressure of 10 psig although other cracking pressures
can be supplied. See Datasheet VAC-036 for further details

Materials
Probes / Quills are usually manufactured special to order and as
such are available in a full range of materials including:
316 St St, LF2 Carbon Steel, Duplex, Super Duplex, Hastelloy,
6Mo, Monel, Incoloy 600, Inconel 800 etc
Quill profiles
The profile of the end of the quill / probe can be manufactured
to suit the application. Typically on sampling probes the end will
be cut at 45 degrees to face the on coming process stream
whereas on injection quills the ends are usually sealed except
for a small outlet hole as defined by the user.

Budenberg Gauge Co Ltd
4 Gilchrist Road. Northbank Industrial Park. Irlam. Manchester. M44 5AY.
Tel : +44 (0)844 372 8900. Fax : +44 (0)844 372 8925.
Email : sales@budenberg.co.uk Web: www.budenberginstruments.com
Rev-02 August 2009

Designed and Manufactured in UK.

Datasheet VAC-049