Key and Wheel Operated
Valves in 'O' Ring Seal
Design
Product Features
Reliable, precision
machined and low torque
design in general
requiring no maintenance
through out service
life.
Meets IS:3224:2002 and
designed to meet EN ISO
10297:2006 standard.
Design provides O-ring
backed by high durometer
elastomer back up ring
for external tightness.
Thrust washer between
the top spindle collar
and gland nut further
protects the O-ring at
high pressure.
Valve body precision
machined from low
tensile brass for CO2
service.
Gland nut abutts at the
inner end with the valve
body ensuring metal to
metal seal eliminating
need to retighten the
gland nut.
Spindles machined from
naval brass for
toughness and wear
resistance except top
spindle for key operated
valves which is machined
from SS-304 rods and
designed to fail safely,
below square at a
closing/opening torque
between 65-70 Nm. This
ensures that in case
excessive torque is
applied on the operating
mechanism; the spindle
shears before damaging
the bottom spindle and
the valve body.
Bottom spindle threads,
thrust washer, 'O' ring
and back up ring are
lubricated by food grade
approved CO2
compatible lubricant to
eliminate seizing and
galling under
high-pressure operation
and very low torque
operation.
Valves fitted with
Capsule type weather
resistant Nickel 201 PRD
rated at 200-220 kgf/cm2
as per requirements of
IS:3224:2002.
Valve body designed to
withstand impact
strength of 300 J making
it suitable for cylinder
package mass of 83.33
kgs if used without
valve guard.
Valves can be provided
for maximum test
pressure up to 250 Bar,
as required by European
ADR 2007 P200 for
filling ratio of 0.75
Bar.
CWH-10/C Test
Report to EN ISO
10297:2006
CWH-10/C Test
Certificate to
Module B of TPED
1999/36/EC
Key operated valves -
Series : MKH-10/C
Wheel operated valves -
Series : CWH-10/C
Material of Construction
Item
No.
Description
Materials
01.
Body - Forged
Low Tensile Brass
02.
Bottom Spindle
Naval Brass with
Nylon 66 soft
seating
03.
Top Spindle
Naval Brass
For CWH-10/C
AISI 304
For MKH-10/C
04.
Thrust Washer
Nylon 66
05.
Gland Nut
Free Cutting Brass
IS:319
06.
Backup Ring
EPDM
07.
'O' Ring
08.
Burst
Disc
Sealing
Gasket
Copper
09.
Burst disc
Nickel 201
10.
Retainer Plug
Free Cutting Brass
IS:319
11.
Hand Wheel
30%
Glass
Filled
Nylon 6
12.
Wheel Nut
Free Cutting Brass
For CWH-10/C only
13.
Wheel Washer
Torque Values
Series
MKH-10/C
CWH-10/C
Gland Nut Installation
60-70 Nm
Spindle (Under full service
pressure with Outlet capped)
6 Nm
2-3 Nm
Pressure relief device
30-35 Nm
Service Chart and
Technical Details
Inlet connection
Outlet Connection
Valves available in a variety of
inlet sizes to various domestic
and international
specifications. Refer inlet
chart for more details.
IS 3224:2002
CGA V-1-2005
BS 341-3:2002
(Up to 250 Bar)
DIN 477-1:1990
(Up to 300 Bar)
No.
Thread
No.
Thread
No.
Thread
No.
Thread
7
W 21.8
x 1.814
-RH
(External)
320
.825-14
NGO-RH-
EXT
8
0.860"x14
Tpi -Whit
(External)
6
W
21.8 X 1/14
(External)
Dip Tube Provision: Valves
Tapped 3/8" BSB at Inlet.
Spindle square size : 9.5 mm,
Flow coefficient (Cv) = 0.7 min
Safety Disc Burst Pressure : 200
– 220 kgf/cm2, May also be
provided as per customer
requirement.
Wrench size : 30 mm as per Din
477-1-1991.
Flow discharge capacity of PRD –
46 cfm (Suitable for use with
cylinders having Water Capacity
up to 67 lbs).
