Main Steam Valve; Steam Safety Valves; Water Level Gauge Set (Sight Glass); Gas Supply - FULTON J Series Installation, Operation And Maintenance Manual

INSTALLATION - 2
2.7

MAIN STEAM VALVE

The main steam stop valve should be inserted in the steam line approximately 305 mm from the
top of the boiler.
2.8

STEAM SAFETY VALVES

Safety valves are factory fitted and pre-set, they MUST NOT be adjusted. The discharge outlet
should be piped to a safe discharge point and the piping so arranged that any condensate
trapped in the pipework will drain away from the valve.
Note: It is recommended that the safety valve discharge pipework is installed to the requirements of BS806
clause 4.9.7. / BSEN 134801-1:2002
a) The lift pressure is indicated on the safety valve (do not adjust).
b) The safety valve fitted to the boiler is designed to prevent the boiler exceeding its design
pressure.
c) Any system connected to the boiler not capable of accepting boiler pressure must be protected
by a separate safety valve set to the required pressure.
Factory fitted safety valves are pre-set to protect the boiler only and must not be used to protect any
2.9

WATER LEVEL GAUGE SET (SIGHT GLASS)

Boilers are normally supplied with two complete water level gauge sets (sight glasses). The water
level gauge blowdown cock should be connected to the auxiliary blowdown line from the water
column blowdown valve by 3/8 in. soft copper tubing.
2.10

GAS SUPPLY

Verify that the burner is suitable for the type of gas being supplied. Ensure that the piping from
the meter is the correct size, and that a gas cock is inserted in the line between the boiler and
the meter. To avoid pressure drops, eliminate all unnecessary bends and elbows in the pipework
between the gas meter and the boiler. A scale trap is provided on the gas train and should be
used.
Burners suitable for operation on natural and manufactured gas are supplied with gas trains or a
modular gas head.
A minimum pressure of 18 mbar at the specified flow rate, is required at the gas train for
natural gas installations and a minimum pressure of 50 mbar is required at the gas train for
manufactured/L.P gas installations.
If the gas supply is in excess of 100 mbar for Natural gas a suitable regulator is required before
the main gas valve.
Burners arranged for operation on L.P. gas are supplied with gas trains. It is essential that the
MAXIMUM pressure of the gas at the gas train does not exceed 80 mbar and does not fall below
50 mbar. A suitable regulator is required before the main gas valve.
To obtain these pressures, a pressure regulating device or service governor must be fitted to the
supply line from the storage tank to the boiler gas train.
Careful consideration must be given to the siting of LPG storage tanks to prevent over pressure
conditions arising, due to temperature rises caused by solar gain.
Page 8
!
WARNING
other items not capable of accepting boiler pressure.
Fulton Ltd
JGASUK-IOMM-2015-2