1. Relief valve
Relief valve is one of safe accessory with indispensable boiler, it has two effect:
It is to become when boiler pressure reachs rated limit, relief valve is automatic open, emit vapour, issue warning, make fireman personnel can take step in time.
2 it is relief valve open hind can the steam with enough eduction, make boiler pressure does not fall, drop when pressure to when nominal working pressure is the following, relief valve can be shut automatically namely.
The relief valve that industrial boiler place uses has commonly: Relief valve of spring relief valve, lever type relief valve, quiet heavy style 3 kinds, amphibious boiler uses current soda water commonly the action that water seals a canal to replace relief valve.
Relief valve is like below a few note when use:
Relief valve should vertical ground installation is in drum is highest the position, valve must not be installed between relief valve and drum. Relief valve should install the valve that discharge steam commonly, the canal that discharge steam should receive safe place as far as possible. The valve of a powerful person to prevent relief valve and valve base are clingy, should make a hand move to relief valve regularly or put steam experiment automatically. Relief valve comes every year major check, try lead sealing, save report of good desired result.
2. pressure is expressed
Pressure watch is one of safe accessory with indispensable boiler, its action is to use the measurement that measure and shows strength of boiler internal pressure. On boiler if do not have pressure watch, or pressure expresses malfunction, the pressure inside boiler cannot express, endanger security directly thereby, boiler is making up acute, accurate pressure is expressed, fireman personnel can operate boiler correctly by this, ensure safe economy ground moves.
Pressure watch is like next notes when use:
A. Pressure watch should be chosen according to actuating pressure, the 1.5~3.0 that pressure expresses dial scale maximum to should be actuating pressure times, had better choose 2 times.
B. Pressure expresses dial size to should make sure fireman labour can see pressure indicated value clearly, dial diameter should not be less than 100mm, average height amounts to 2 meters boiler to choose pressure to express a diameter to should not be less than 200mm.
C. Pressure is expressed should desired result of every half an year, delimit in actuating pressure place red line adds lead sealing.
D. Between pressure watch and drum due the bent housing that put water and 3 faucets.
3. water level is expressed
Water level watch has glass to provide type and flat form two kinds, should delimit on water level watch have high water level, medium water level, low water 3 red line, offlet of water level watch should be received to safe place.
4. blowdown a powerful person
Blowdown a powerful person holds the lowermost office that encircles in the offal of boiler of drum, vertical, its action has: It is to discharge boiler the furring inside and corrupt broken bits, 2 it is to become boiler full water or Yu Shui can be discharged when stopping furnace to clean.
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