Bryan Boilers Forced Draft Steam Boilers User Manual download pdf (Page 4)

1.4 BOILER CONNECTIONS

1.4.1 GENERAL

Do not run any pipes along the access panel

side of the boiler. Maintain clearances as

shown on the dimensional drawing for

servicing of the boiler tubes. Provide at least

36" from the gas train and burner, unless a

larger dimension is indicated on the

dimensional. All piping should be designed

and installed to avoid any loadings on the

boiler connections or piping.

1.4.2 STEAM SUPPLY CONNECTION

A steam shut-off valve must be installed

between each boiler and the steam main.

This valve must be of the outside screw and

yoke design to allow indication from a

distance whether the valve is open or closed.

1.4.3 FEEDWATER CONNECTION

Install a check valve and a globe valve

between the feed pump and the boiler. It is

also recommended to install a globe valve

between the feed pump and the receiver

tank. This valve can then be adjusted to

bypass excess pump capacity to better

control the boiler feed rate.

1.4.4 SAFETY RELIEF VALVE(S)

A connection is provided in the top of the

boiler for the relief valve. The relief valve

discharge piping must be the same size as

the relief valve discharge opening. Avoid

over-tightening as this can distort valve seats.

All piping from relief valve must be

independently supported with no weight

carried by the valve.

1.4.4 BLOWDOWN CONNECTION

Blowdown valve(s) must be full size of the

connection on the boiler. Steam boilers 15

psig and below require at least one blowdown

valve. Higher pressure boilers require two

blowdown valves with one or both valves

being slow opening type. Each water column

and float type low water cut-off must be

equipped with a blowdown valve.

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