Ashcroft 1036 Gauge with 1037 Fitting - Manual (Page 15)

15
Type 1279 & 1379 Solid Front Duragauge ®
Pressure Gauge Liquid Fill Conversion
Instructions
© 2007 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA, Tel: 203-378-8281, Fax 203-385-0402 www.ashcroft.com
All sales subject to standard terms and conditions of sale. All rights reserved. I&M008-10090 (84B276) Rev 02/12
1. Unscrew front threaded ring (turn CCW).
Remove and discard glass window. For
range spans 60 psi and under, shift point-
er down scale by the amount shown in the
table. With either the glass or plastic win-
dow, replace the O-ring with one furnished
in the kit.
2. Remove protective paper from acrylic
plastic window taking care not to scratch
window. Assemble window in gauge.
3. Moisten face of threaded ring with silicone
oil or silicone grease where ring bears up
against window. Replace front threaded
ring and tighten firmly hand tight. See
instructions on reverse side for applying
proper torque to ring to establish desired
squeeze on O-ring seal. (Fig. 4).
It is important to hold gauge rigidly, oth-
erwise ring lugs may be damaged during
removal or assembly process.
4. From rear of gauge, remove and discard
these parts: rear cover and cover gaskets
from case.
Note: Disregard Step Nos. 5a and 5b if
converting to hermetically sealed version.
When converting a 45-1379 with the top fill
hole configuration, p/n 256A176-01 fill plug
is required and must be ordered separately.
5. Filling Procedures:
a. Manual Filling Procedure: Place
gauge face down on bench and tip
gauge by blocking up front with a
3 ⁄
8
inch block at the 12 o’clock dial posi-
tion. Tipping of the gauge is necessary
so fluid will flow into front cavity of the
case. Pour in fill liquid to within about
1 ⁄
16
inch of rear seal lip. When bubbles
stop rising, front cavity is filled.
Remove
3 ⁄
8
inch block and pour in liq-
uid until level is about 1 ⁄
16
inch below
rear sealing lip.
Note: An alternative method of filling is
to fill the front dial cavity, adding the
front window, etc., as in Step No. 3.
TYPICAL 45-1279_S-04L-100* GAUGE
SHOWN WITH KIT 101A202-01
“O” Ring Acrylic Window Threaded Ring
Elastomeric Diaphragm
with Integral “O” Ring Rear Cover
Ambient 60 psi and Under
Temp. Limits Down Scale Zero
°F °C Shift Required
Weatherproof –50/150 –45/65 N/A
Hermetically Sealed –10/125 –25/50 N/A
Glycerin Filled 0/150 30/65 .15 psi
Silicone Filled –50/150 –45/65 .12 psi
Then fill the rear of the gauge. This
method eliminates the need to tip the
gauge.
b. Vacuum Pump Fill Procedure: (This
procedure is recommended when fill-
ing a large number of gauges.) Place
gauge face down and insert a
1 ⁄ 8 inch
diameter tube, connected to a vacuum
pump, through the 12 o’clock position
hole in the rear, solid front portion of
the case (see Fig. 5). Evacuate the air
from the front dial cavity while pouring
in the fill fluid through the case back.
The vacuum will displace the air with
fluid. When the dial cavity is solidly
filled, remove the tubing and continue
to pour the fill fluid to within
1 ⁄ 16 inch
BELOW the O -ring channel lip.
Pre-measuring fill amount is not nec-
essary with above methods. For refer-
ence, amount of fill is approximately
400 ml. or 14 fluid oz. (4
1 ⁄
2
˝ GA.) and
455 ml. or 16 fluid oz. (6˝ GA.).
c. Note: The liquid fill level should be 3 ⁄
8
˝
(± 1 ⁄
8
) as measured from the inside of
the ring at the 12:00 o’clock position.
6. On lower connection gauges, assemble
rear seal dia phragm to case.
For back connection gauges see instruc-
tions on reverse side. (Fig. 2/4).
7. For 1279:
Assemble rear cover and six self tapping
screws in a criss-cross pattern and torque
to 12 in lbs. (±2 in lbs.)
For 1379:
- Thread rear ring and torque to 200 in lbs
- Install stainless steel back cover using
two screws. Torque screws to 14 in lbs.
(±2 in lbs.)
8. Assemble throttle screw to threaded hole
in socket.
Note: If system is monel (socket wrench
flat stamped “PHS” or “PH”) use monel
throttle screw.
9. Check appropriate box on fill identification
label, and peel off label back, and attach
fill label to gauge case.
10. If gauge is to be repackaged:
a. Include enclosed instruction sheet
inside carton.
b. Change type number on carton label to:
(1) Hermetically Sealed – 1279(*)SH.
(2) Liquid Filled – 1279(*)SL.
*Bourdon Tube System Code
Glycerin or silicone should not be used in
applications involving Oxygen, Chlorine, Nitric
Acid, Hydrogen Peroxide or other strong oxi-
dizing agents, because of danger of sponta-
neous chemical reaction, ignition or explosion.
Halocarbon should be specified. Products
with this fill can be ordered from factory.
The use of fluids other than those listed in the
table above (for example, Hydrocarbon-based
oils) may result in leakage caused by a reac-
tion between the fluid and the elastomeric
seals. Consult the factory before filling with
any other fluid.
1279 1379
4 1 ⁄ 2 ˝ LOWER 4 1 ⁄ 2 ˝ BACK 4 1 ⁄ 2 ˝ LOWER 4 1 ⁄ 2 ˝ BACK 6˝ LOWER & BACK
KIT PART NO. 101A202-01 101A203-01 1280 1283 1284
QUANTITY INCLUDED
ACRYLIC WINDOW 1 1 1 1 1
FRONT O-RING 1 1 1 1 1
DIAPHRAGM (1) 1 1 1 1 2(1-LC:1-BC)
REAR COVER 1 1 1 1 2(1-LC:1-BC)
COVER SCREWS 4 4 - - -
THROTTLE SCREWS 2 2 2 2 2
GARTER SPRING – 1 1 1 1
FILL IDENTIFICATION 1 1 1 1 1
THREADED RING – – 1 1 1
1. When Halocarbon fill is a requirement, rear case diaphragm bladder material is Viton
instead of the standard Buna diaphragm bladder. Consult factory for part number.