DHI molstic hi flow User Manual

Calibration Solutions
for Pressure
and Flow™

Instruct ion Sheet

molstic™ hi flow

molstic™ hi flow

molstic™ hi flowmolstic™ hi flow

P/N 401663

molbloc™ Mounting System

DESCRIPTION

molstics provide an engineered solution to the practical issues of mounting a molbloc, connecting a gas supply,
regulating the pressure and connecting the device to be tested. Highest quality components are integrated into
a convenient, compact assembly.

molstic, hi flow (P/N 401663) is designed for use with the 1E5 molbloc at flows up to 100 slm. It does not
accommodate any other size molblocs.

A gas supply is connected us ing a quick connector. A 2 micron filter protects the downstream components.
Then, an adjustable (0 kPa/0 psig to 700 kP a/100 psig) regul ator sets molbl oc upstream pres sure and protects
the molbox transducers against accidental overpressure. A bellows shut-off valve, just before the molbloc,
allows the gas supply upstream of the molbl oc to be shut-off. A connection and a vertically adjus table DUT
platform are provi ded downstream of the mol bloc for mounting a device under test or the optional metering
valve kit.

START UP

Starting up a molsti c requires connecti ng a gas pressure s upply, adj usting the pres sure regulator i f necessary ,
and connecting the device or system to be tested downstream of the molbloc.

®

! Connect the gas supply: Connect a gas supply to the quick connector stem (1/4 i n. SWG

SS-QC4-D-400). Ideally, i nlet supply pressure is regulated to approximately 760 kPa (110 psi g). In no
case should the supply exceed 1 MPa (150 psig). Note: Be sure the molstic isolation valve (1) is
closed (handle down) before connecting the qui ck connec tor stem to the quic k connector. Do not connect
or disconnect the quick connector with a pressure greater than 1.5 MPa (200 psi) on either side.

, NUPRO®

#

# Install the molbloc: Install the molbloc onto the molstic (see molbloc INSTALLATION below).

##

$

$ Adjust the pressure regulator: The molstic is delivered with the pressure regulator set to 270 kPa

$$

absolute (40 psia) (about 165 kP a gauge (26 psig)), the most common molbl oc upstream press ure setting.
Depending on the molbloc’s pressure dependent cal ibration type, a different molbloc upstream pressure
setting may be needed (see the molbloc calibration report). To adjust the regulator, cap the pressure
downstream of the molbloc. Open the molbloc i solation valve (1). Read the molbloc upstream pressure
using the [P&T] function of the molbox (see the mol box Operation and Maintenance Manual). Adjust the
molbloc upstream pressure to the des ired val ue by inserting a screw driver into the regulator stem (4) and
rotating the adjustment screw until the desired press ure is set. Note: The regulator is NOT self venting.
If desired, once the desired pressure is set, lock the regulator stem by tightening the jam nut on the stem.

%

% Install the MFC/device under test: The downstream connection is 1/2 in. VC R. If desired, install the

%%

1/2 in. to 1/4 in. VCR adaptor provided in the molsti c accessories. For DUT fittings other than VCR, use
the appropriate adaptor (not suppl ied). If desi red, instal l the DU T platform (2) to assure that the D UT is at
the correct height for alignment with the molsti c downs tream fitting (see DUT PLATFORM INSTALLATION
AND OPERATION below). If you have a metering valve option for manual flow control, install it here.
The metering valve option requires use of the 1/2 in. to 1/4 in. adaptor.

QUICK CONNECT
S T E M WI T H ¼ IN.
SWAG ELOK FITTING

QUICK
CONNECTOR

½ IN.
VCR

molstic™, hi flow, molbloc™ Mounting Syst em Instruct ion Sheet

molstic™, hi flow, molbloc™ Mounting Syst em Instruct ion Sheet

molstic™, hi flow, molbloc™ Mounting Syst em Instruct ion Sheetmolstic™, hi flow, molbloc™ Mounting Syst em Instruct ion Sheet

molbloc INSTALLATION

! Loosen the interconnecting nipple clamp (3) so that the nipple can move freely in its rubber grommet.

Move the nipple away from the molbloc cradles to allow maximum room for molbloc insertion.

#

# Place the molbloc in the molsti c molbl oc cradles (be sure flow orientation is correct). C heck that no debris

##

is under molbloc.

$

$ Connect and tighten the upstream (valve side) molbl oc VCR connection using a soft O-ring and following

$$

the procedure provided in Document 560009 (Recommendations for molbloc Ins tall ation) suppli ed with the
molbloc.

%

% Pull the interconnecting nipple towards the molbloc downstream connection. Connect and tighten the

%%

downstream molbloc VCR connection using a soft O-ring and following the procedure provided in
Document 560009 (Recommendations for molbloc Installation) supplied with the molbloc.

& Tighten the interconnecting nipple clamp (3) until the nipple is secure (5 N/m max).

'

' Connect the molbloc to the molbox and leak check the system.

''

((((

To remove a molbloc from the molstic, reverse the procedure. Break the downstream molbloc VCR

connector and pull the interconnecting nipple away from the bloc. Break the upstream molbloc
VCR connector. Remove the molbloc.

QUICK CONNECT
STEM WITH ¼ IN.
SW AGELO K F ITTING

QUICK
CONNECTOR

½ IN .
VCR

DUT PLATFORM INSTALLATION AND OPERATION

! Insert socket cap screws (1) through two parallel mounting holes in the molstic

base corresponding to the desired DUT platform position.

#

# Thread thumbwheels (2) onto screws (1) to about half way up the screw.

##

$

$ Using a 4 mm Allen wrench, ti ghten the screws (1) into the DUT platform (3).

$$

Tighten until snug, do NOT overtighten.

%

% Rotate thumbwheels (2) to posit ion the DUT platform at the desired height so that the DUT fitting aligns

%%

with the molstic downstream fitting.

MAINTENANCE AND RECOMMENDATIONS

) Filter: The molstic fil ter is a sealed 2 micron pleated mesh filter (NUPRO SS -4FW-VCR-2). It can be

cleaned by backflushing. To backflush, it must be removed from the mol stic. When removing, cleaning
and installing the filter, the metallic VCR gaskets (NUPRO SS-4-VCR-2-GR) must be replaced and all
manufacturers’ recommendations followed.

)

) Handling: mols tic should not be picked up or carried by its components. Always handle the molstic by

))

its base.

molbloc, molbox and molstic are trademarks of DH Instruments, Inc.

Nupro is a registered trademark of NUPRO Co. NUPRO is a Swagelok company.

SWG and VCR are registered trademarks of The Swagelok Companies.

Document 560040a 010626

DH Instr um ents, Inc.

4765 East Beaut i ful Lane
Phoenix AZ 85044-5318
USA

Calibration Solutions
for Pressure
and Flow™

Tel [phone]

Fax [phone]

[e-mail]

www.dhinstruments.com

.

E

m

molbloc, molbox and molstic are trademarks of DH Instruments, Inc.

Nupro is a registered trademark of NUPRO Co.. NUPRO is a Swagelok company.

SWG and VCR are registered t radem arks of The Sw agelok Cos.

Document 560015b 990720

DH Instruments, Inc.

1905 W. Third St. • Tempe, AZ 85281-2490 • USA
Tel [phone] • Fax [phone]
[e-mail] • www.dhinstrum ents.com

120 av, Ch. de Gaulle • 92200 Neuilly sur Seine • FRANC

Tel [phone] • Fax [phone]

[e-mail]

in Europe:

CalTechnix S.A