Quickmount Installation, Operating and Maintenance Instructions
Issue 3
08/10/98
Page
1
of
8
INSTALLATION OPERATING AND
MAINTENANCE INSTRUCTIONS
SEETRU LTD.
ALBION DOCKSIDE WORKS, HANOVER PLACE, BRISTOL BS1 6UT. ENGLAND
TEL: 0117 927 9204. FAX :0117 929 8193. EMAIL:[email protected]
SEETRU QUICKMOUNT GAUGE
GENERAL DESCRIPTION
The Seetru Quickmount gauge consists of a transparent sight tube fixed to the outside of a tank and
isolated from it by screwdown value units which may be fitted with automatic safety valves. They control
the flow of liquid to the sight tube when the gauge valves are opened to show the level in the tank.
The sight tube (1) is protected against breakage by the guard tube (2) which surrounds it apart from
windows through which the liquid level can be seen. Anti-rattle rings (3) are fitted over the sight tube and
fit the inside diameter of the guard tube. The guard tube is in turn supported by the support bracket (4)
only fitted on gauges exceeding 3ft, centre distance which is secured by screws (5) to a special pad welded
to the tank.
Gauge collars (6/7) are fitted at top and bottom ends of the sight tube. Valveless (6) may be used at both
ends whilst the bottom (7) is fitted with a drain valve. The sight tube is sealed by “0” rings (9/10) which
are compressed by the polypropylene bushes (8) when the gland nuts (11) are tightened. Slide top gauge
collar (6) over valve unit (12) and slide the gauge collar (7) over valve unit (32) which are sealed by “0”
rings (7). They are securely retained on the body of the units by retaining nuts (26) and are sealed by “0”
rings (22) to prevent leakage.
Samples of the tank content may be taken for examination by unscrewing the drain valve ferrule (18).
This drain valve is sealed against leakage by a plunger (14) fitted with “0” rings (15/16) and retained in
the ferrule by a circlip (19). It is prevented from being removed from the collar by the pin.
Both valve unit bodies are sealed to the tank boss with fibre washers (27) and contains a screwdown valve
(25/29) sealed by “0” rings (24) against leakage. The retaining clip (21) prevents the screwdown from
being removed from the unit.
The head of a screwdown valve fitted with an automatic safety valve (29) is marked “ASV”. If the sight
tube is broken, loss of liquid is prevented by the automatic shut-off valve in the valve body (28). The
abnormal flow acting on sealing ball (30) forces it forward to seal on seat in body. When valve is open
ball (30) is retained by retaining clip (31).
INSTALLATION INSTRUCTIONS
1. Valve units (12/32) must be screwed into the tank bosses and sealed by use of the fibre washers (27)
provided. Once fitted these units should not be disturbed.