Recommendations for 1/4 in.
Low- and Mid-Flow Metering
Valve Kits for molstic-S™
P/Ns 401885 and 401666
Instruction Sheet
The 1/4 in. molstic-S™ is delivered with integrated
shut-off/metering valves. These valves provide a
measure of flow control for use when calibrating
devices that do not have their own flow control means.
However their primary use on the molstic-S is to
provide a means of positive flow shut-off to allow for
system leak testing. The 1/4 in. low-flow and 1/4 in.
mid-flow metering valve kits provide higher precision
flow control capability.
Use the 1/4 in. metering valve kits with the following
molbloc-S
®
ranges and molboxes™:
Table 1
Metering Valve Use with molbloc-S
MOLBOX1-A700K MOLBOX1-A350K
Low-Flow, P/N 401885
5E1-S 5E1-S
Mid-Flow, P/N 401666
1E2-S, 2E2-S
1E2-S, 2E2-S
INSTALLATION OF 1/4 IN. METERING
VALVE ONTO MOLSTIC-S PLATFORMS
WITHOUT REGULATORS
Use the following procedure to install the metering
valve kit onto the molstic-S platform that does not have
the integrated regulator:
Attach the valve bracket to the base of the valve
using the two included #10-32 socket head cap
screws, the two #10 flat washers and the two #10
lock washers. The long side of the bracket should
be perpendicular to the direction of flow through
the valve.
Using a pair of properly sized wrenches, break the
connection between the downstream end of the
filter element (1) and the female VCR
®
swivel nut (2)
on the inlet of the molstic-S. Do not disassemble
the parts on the inlet side of the filter element (1).
Discard the VCR gasket, which is for one-time use.
Place a new 1/4 in. VCR gasket (P/N 102183)
securely against the sealing surface inside the female
VCR swivel nut (2) of the molstic-S inlet.
Place the metering valve and bracket assembly (4)
onto the molstic-S platform and align the VCR
connection. Assure that the flow direction of the
valve matches the direction of flow of the molstic-S.
Tighten the female nut (2) finger-tight.
Hold male body stationary with a backup wrench.
Tighten the female nut (2) 1/8 turn past finger-tight.
Thread the included double female VCR union
(non-swivel type), (3), onto the inlet fitting of the
metering valve. Leave it approximately one full
revolution from the fully stopped position.
Place a new 1/4 in. VCR gasket (P/N 102183)
securely against the sealing surface inside the
double female VCR union (non-swivel type) (3).
Install the filter (1) and upstream plumbing into the
female VCR union (3). Tighten the female nut
finger-tight.
Hold male body stationary with a backup wrench.
Tighten the female nut 1/8 turn past finger-tight.
