Introduction
Valves and filters form an
essential part of any process plant or system in a wide range of applications from
relatively simple on/off functions to flow control, pressure relief and filtering.
All wetted parts of valves and fitters described in this section of the catalogue
are constructed from borosilicate glass, PTFE, Ceramic, FEP, PFA or tantalum thus ensuring
maximum resistance to corrosion. In addition, as valves have a glass body, visual
monitoring of the valve operation is possible at all times.
For standard flat Buttress end connections from DN 25
to DN 150, it is possible to achieve a 3 deflection
in the joint by using a flexible gasket. Details of these and all other couplings and
gasket can be found in section -Couplings.
The valves
described in this section of the catalogue comply, which means that 90°
bends, tee pieces and equal crosses (see section – Pipeline Components) are
interchangeable with certain type such as angle valve.
DN refers to the nominal bore. Unless otherwise stated, all dimensions are
given in mm.
For permissible operating conditions, Unless otherwise stated in the individual description,
please see section –Technical Information. Generally, the maximum
operating temperature for valves is 200°C but temperature above ambient, particularly in the
range from 120°C to 200°C, impose restrictions on the permissible operating
pressure.
A wide
variety of valves are available for a range of purposes. All have borosilicate glass
bodies. As a result operation of the valve can be checked visually. In practically every
case glass is combined with PTFE, which ensures that the valves have maximum resistance to
corrosion.
All the
valves are suitable for use under full vacuum. Pressure ratings at ambient temperature are
indicated in the tables applicable to each type of valve.
The maximum
operating temperature is 200° C but temperatures above ambient particularly in the range
120° C to 200° C, impose restrictions on the permissible operating pressure. In case of
doubt it is advisable to consult us.
These valves
comply with ISO 3587 where applicable. Thus maximum interchangeability of compatible
components is assured. For example, angle valves can be interchanged with 90 ells, equal
tee pieces and equal crosses.
DN refers to nominal bore. Unless otherwise stated
dimensions are in millimeters. Figures given for maximum recommended working pressure
represent pressure above atmospheric.
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