molbloc, molbloc-S, molbox, molstic and molstic-s are trademarks, registered and otherwise, of
DH Instruments, Inc.
VCR is a registered trademark of the Swagelok Company.
Viton is a registered trademarks of DuPont deNemours Company.
Document 560055a
030108
DH Instruments, Inc.
4765 East Beautiful Lane
Phoenix AZ 85044-5318
USA
Tel 602.431.9100
Fax 602.431.9559
www.dhinstruments.com
Place the flat side of the 60 mm nut plate under
the molstic-S platform (see figure below). Align it
with the holes in the platform and the valve bracket.
Hold it in place.
Thread the socket head cap screws through the
valve bracket and tighten securely into the nut plate.
INSTALLATION OF 1/4 IN. METERING
VALVE ONTO MOLSTIC-S PLATFORMS
WITH REGULATORS
Use double female swivel union (5) in place of the
non-swivel union (3) when installing the metering
valve kit (4) onto a molstic-S that has the
integrated regulator. Use a new 1/4 in. VCR
gasket (P/N 102183) on each end of the union.
Re-secure the regulator (6) to the molstic-S
platform (7) with the socket head cap screws and
nut plate.
MOLSTIC-S OPERATION WITH 1/4 IN.
LOW-FLOW AND MID-FLOW METERING
VALVE
The flow shut-off/metering valve that is integral to the
molstic-S should be opened fully when using the 1/4 in.
low-flow and 1/4 in. mid-flow metering valves to adjust
flow to the molbloc-S. The metering valves supplied
with this kit may limit the maximum obtainable flow rate
of some of the molbloc-S elements that can be mounted
on the 1/4 in. molstic-S (see Table 1). In these cases the
shut-off/metering valve that is integral to the molstic-S
should be used, (and the metering valve removed).
In order to make extremely fine flow rate adjustments
the metering valve can be used in combination with
small adjustments in the supply pressure.
Do not adjust the supply pressure to the 1/4 in.
metering valve in excess of the maximum operating
pressure of the molbox: 600 kPaa (87 psia) for
molbox1-A700K; 250 kPaa (36 psia) for molbox1-
A350K.
Do not attempt to completely close off flow
using the 1/4 in. low-flow or mid-flow metering
valve. They are not designed to be used as shut
off valves. Damage to the valve seat can occur.
PARTS INCLUDED WITH 1/4 IN.
LOW-FLOW AND MID-FLOW METERING
VALVE KITS
The following parts are included in the shipment:
P/N 401885
Low-Flow Metering Valve Kit
DESCRIPTION
QTY
PART NO.
Metering valve, low flow
1
102570
Bracket, valve
1
123612
Union, 4VCR F x 4VCR F
1
102181
Gasket, 4VCR
2
102183
Nut plate, 60 mm
1
123621
Washer, flat, M4
2
100918-Z
Screw, SHC, M4 X 12
2
101016-Z
Washer, split lock, #10
2
103021-Z
Screw, SHC, 10-32 X 3/8
2
103277-Z
Washer, flat, #10
2
103278-Z
Union, swivel, 4VCR F x 4VCR F
1
102144
P/N 401666
Mid-Flow Metering Valve Kit
DESCRIPTION
QTY
PART NO.
Metering valve, mid flow
1
102571
Bracket, valve
1
123612
Union, 4VCR F x 4VCR F
1
102181
Gasket, 4VCR
2
102183
Nut plate, 60 mm
1
123621
Washer, flat, M4
2
100918-Z
Screw, SHC, M4 X 12
2
101016-Z
Washer, split lock, #10
2
103021-Z
Screw, SHC, 10-32 X 3/8
2
103277-Z
Washer, flat, #10
2
103278-Z
Union, swivel, 4VCR F x 4VCR F
1
102144
