Long-term sealing plus

fugitive emission control

Supagraf Control is an innovative leak tightness with helium to <10 -4 mbar.

®

compression packing that litre.s -1.m -1. The tests were undertaken with
10 MPa/100 bar (1450 psi) at 20°C (68°F), VALVE STEM DUTIES
provides long-term, high integrity and 5.7 MPa/57 bar (827 psi) at a fluid flow Maximum Operating Temperature:
sealing for control valves. Its very temperature of 425°C (797°F) for 100,000 With Thermal Cycling
low friction enhances the control stem cycles. +350°C (+662°F)
accuracy of valves. • ISO 15848-1: Dresser Masoneilan control Minimum Operating Temperature:
valves fitted with Supagraf Control are
®

certified to ISO 15848-1 Class BH, CC3,

-200°C (-328°F)
Maximum System Pressure:
This is a ‘best available technique’ product for at temperatures from -29°C to +425°C
reducing industry’s VOC fugitive emissions (-20°F to +797°F). The valves showed helium 25 MPa/250 bar (3626 psi)
in line with the European Union’s IPPC Directive. leakage rates < 10-4mg.s -1.m -1 for 100,000
stem operating cycles. This was achieved with
It is manufactured in exfoliated graphite,
pressure of 5.75 MPa/57 bar (834 psi) at fluid
reinforced in a novel way with a non-metallic
flow temperature of +425°C (+797°F) and
structure to provide additional strength and
10.34 MPa/103 bar (1500 psi) at -29°C to
resistance to pressure and extrusion.
+38°C (-20°F to +100°F).
An advanced lubricant system is incorporated to
prevent the pick-up of graphite on valve stems.
Chemical properties
Compatible with media in the range pH 1-14,
Prime features
excluding strong oxidising agents. It has low
• H
 igh integrity gland sealing for control volatiles content.
valve stems: to well below 50ppm fugitive
emission level.
How supplied
• L
 ong-term adjustment-free operation: over
100,000 stem strokes with emission levels All popular square sections from 3 mm
below 50ppmV . (1/8") upwards in boxes containing 8 m (26’ 3”),
in coil form or on spools as detailed in the
• V
 ery low coefficient of friction for smooth
table below. Also supplied as split preformed
and accurate valve action.
rings and sets.
• R
 educed friction requirement to save
on power consumption and enable smaller
actuators to be used. Spool ordering information
Size Packaged ± 10%
Typical applications mm inch kg lbs
Designed for emission control - to better than
50ppmV leak tightness - on control valves in
3.0 1/8 0.9 2
systems handling fluid media such as 5.0 3/16 0.9 2
hydrocarbon liquid fuels and gases, lubricating
oils and hazardous process chemicals. 6.5 1/4 0.9 2

It is a long-term replacement for the PTFE 8.0 5/16 2.3 5

V-type packings that can be readily damaged
10.0 - 2.3 5
by ingress of dirt and other foreign particles to
the gland area. 11.0 7/16 2.3 5
12.5 1/2 4.5 10
Specifications
14.0 9/16 4.5 10
• T
 A Luft/VDI 2440: Dresser Masoneilan
control valves fitted with Supagraf Control
® 16.0 5/8 4.5 10 APPROVALS
are certified to TA Luft requirements at 20.0 13/16 4.5 10 TA Luft/VDI 2440
22.0 7/8 4.5 10 ISO 15848-1 Class BH, CC3
25.0 1 4.5 10
James Walker
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Health warning: If PTFE products are heated to elevated temperatures, fumes will be produced which may give unpleasant effects, if inhaled. Whilst some fumes are emitted
below 300°C (572°F) from PTFE, the effect at these temperatures is negligible. Care should be taken to avoid contaminating tobacco with particles of PTFE or PTFE dispersion,
which may remain on hands or clothing. Safety Data Sheets (SDS) are available on request.
Information given in this publication is given in good faith and represents the results of specific individual tests carried out by James Walker or third parties in accordance with the
methodologies described in this publication, performed in a laboratory. No representation or warranty is given in relation to such information. Values and/or operating limits given
in this publication are not an indication that these values and/or operating limits can be applied simultaneously. While such results may comprise useful additional information
and are industry standard tests, they are no substitute for conducting (or procuring from James Walker) your own tests and engineering analysis and satisfying yourself as to
the suitability of the product you select. Please also note that a product tested in accordance with the published methodology may not perform to such values in application
and/or under different test conditions or methodologies for a variety of reasons, including but not limited to the environment in which it is used/tested or which passes through it
or otherwise affects the product, or due to the handling, storage or installation, or due to the effect of housing or other parts. Our personnel will be happy to discuss any historical
examples we have of a product having been previously used in a particular application.
To ensure you are working with the very latest product specifications, please consult the relevant section of the James Walker website: www.jameswalker.biz.

James Walker Sealing Products & Services Ltd

Registered Office: Lion House, Oriental Road,
Woking, Surrey GU22 8AP, United Kingdom.
Reg no: 00264191 England

Issue number 2
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