172-65483MA-03(JH3S-X / JH5SL-X) 31 Jul 2017
19
Needle Valve Unit (Model: JH3S-NV / JH5SL-NV)
Use gloves when operating the needle valve and keep all body parts well
clear of the product. Failure to do so could result in burns, other injury or
damage from the blowing of small amounts of steam and condensate.
CAUTION
•
Operating Instructions for Needle Valve
1. When the product is shipped from the factory, the needle valve is in the closed
position.
2. To operate the needle valve, insert a flat-head screwdriver into the slot on the top
of the needle valve and:
- Open Valve
•
Slowly turn counterclockwise. (Do not continue turning the needle valve past
the point at which the snap ring contacts the bottom of the gland case.)
•
See the above table to determine the amount of steam discharge.
- Close Valve
•
Slowly turn clockwise. (Do not continue turning the needle valve past the point
at which it stops.)
3. If steam should leak from the gland retainer nut or gland case, it can be stopped
by further tightening the gland retainer nut. (Do not over tighten, otherwise the
needle valve may seize and become unworkable.)
Steam Discharge
Differential Pressure (MPa)
D
is
c
har
ge C
apac
it
y
(
k
g/
h)
Differential Pressure (kg/cm
2
)
More than 1.5 turns
1 Turn
¾ Turn
½ Turn
¼ Turn
Number of turns from
full-closed position
Differential Pressure (psi)
More than 1.5 turns
1 Turn
¾ Turn
½ Turn
¼ Turn
Number of turns from
full-closed position
D
is
c
har
ge C
apac
it
y
(
lb/
h)
Gland Retainer Nut
Torque: 30 N
∙m (22 lbf∙ft)
22 mm (
7
/
8
”)
across flats
Gland Case
Torque: 30 N
∙m (22 lbf∙ft)
19 mm (¾”) across flats
Needle Valve
Gland Packing
Gasket
Snap Ring
