27
(1)
Valve housing
(9)
Sealing ring
(2)
Seat
(10)
Upper part
(3)
Cone set with stud
(10a)
Upper part (quick closing)
(4)
Valve spindle
(11)
Handwheel
(4a)
Quick closing valve spindle
(12)
Ball
(5)
Base ring
(13)
Cone set without stud
(6)
Gland packing
(14)
Valve spindle (inclined part)
(7)
Stuffing box
(15)
Hand lever
(8)
Screw cap
(16)
Hexagon nut
10.5 Commissioning
Before every commissioning, re-commissioning, repair or conversion,
ensure proper completion of all installation/assembly works and that
valve has corrected functioning position.
Check specifications of material, pressure and temperature!
•
Open shutoff device of valve without self-closing ball on steam and water holding boiler
studs counterclockwisely as far as it will go (backseat).
•
Slightly open shutoff device of valve with self-closing ball on steam and water holding
boiler studs counterclockwisely to prevent that ball closes valve passage (see fig. 1).
Fully open spindle after accomplished pressure balance (backseat).
•
Compare function of level gauge and water level height with the other safety fittings.
Danger
