Dwyer Instruments Spirahelic 7000 Series Specifications-Installation And Operating Instructions

(3) "B" MOUNTING
HOLES EQUALLY SPACED
ON A "C" BOLT CIRCLE
"A"
The 700 Series Spirahelic
triple helix Bourdon tube for precision measurement of compatible
gases and liquids. The direct drive design reduces friction and
mass, resulting in exceptionally good responsiveness, repeatability
and accuracy. Because there are no gears, springs, linkages or
other complicated mechanisms, wear is practically eliminated.
Solid brass or 316 stainless steel connection block features
convenient dual 1/4˝ female NPT ports-one each on back and
bottom. Block also includes integral filter plug to keep dirt out.
Safety is assured with solid front case design and rear blowout
hole. Gages fit ASME standard panel cutouts, 4.94˝ (125 mm) -
7100; 6.5˝ (165.1 mm) -7200; 9.0˝ (229 mm) -7300.
MODEL NUMBER
WETTED PARTS
7100-XXXXXX
Beryllium copper/Brass
7112-XXXXXX
Iconel
7114A-XXXXXX
Iconel
7214A-XXXXXX
Iconel
7312-XXXXXX
Iconel
INSTALLATION
1. Select a location free from excessive vibration where the
temperature limits of -65 to 180°F (-53.9 to 82.2°C) will not be
exceeded. Mounting surface should be vertical to match the
position in which all standard gages are calibrated. Avoid
locations in direct sunlight which may cause accelerated
discoloration of the clear acrylic lens or where exposure to oil
mist or other airborne vapors could likewise result in lens
damage. Make sure that the case relief area on the rear is not
obstructed. This hole is designed to direct pressure rear-ward
in the event of failure of the Bourdon tube element. See
complete safety recommendations on the back of this sheet.
2. Make a panel cutout of 4.94˝ (125 mm) for Series 7100 gages,
6.5" (165.1 mm) for Series 7200 gages or 9.0˝ (229 mm) for
Series 7300 gages. See drawing above for bolt circle
diameters and bolt hole sizes.
3. Two 1/4˝ female NPT pressure connections are furnished to
allow a choice of vertical (from below gage) or horizontal
piping. The unused port should be plugged. Use a minimal
amount of thread sealant. Too much could block the internal
pressure passage.
CAUTION: When installing fittings or pipe always us a second
wrench on the 1˝ pressure block
Inconel ® INCO Alloys International, Inc.
DWYER INSTRUMENTS, INC.
P.O. Box 373 • Michigan City, IN 46361-0373, U.S.A.
Series 7000 Spirahelic
Specifications - Installation and Operating Instructions
23/64 2-5/32
(9.13) (54.76)
"E" PANEL CUTOUT
120" 1-13/32
(35.71)
"D"
2-1/32
(51.59)
1/4 FEMALE NPT
PRESSURE CONNECTION
1-9/32
TYP 2 PLACES
(32.54)
1 (25.40) SQUARE
CONNETION BLOCK
® Pressure Gages employ a unique
ACCURACY
ASME Grade A
ASME Grade 2A
® X-750/316 SS
® X-750/316 SS ASME Grade 3A
ASME Grade 3A
® X-750/316 SS
® X-750/316 SS ASME Grade 2A
® Pressure Gage
MODEL NO DIM "A" DIM "B"
7100- 5-7/8 (149.23) 7/32 (5.56)
7/32 (5.56)
7112- 5-7/8 (149.23)
7114A- 5-7/8 (149.23) 7/32 (5.56)
7214A- 7-19/32 (192.88) 9/32 (7.14)
7312- 10-3/16 (258.76) 9/32 (7.14)
SCALE 1:4
SPECIFICATIONS:
Service: Compatible gases & liquids.
®
Wetted Materials: Iconel X-750 Bourdon Tube, Type 316L SS
connection block (Grade 2A & 3A Accuracy). Beryllium Copper
Bourdon Tube, nickel-plated brass connection block (Grade A
Accuracy).
Housing: Black polycarbonate case and clear acrylic cover.
Accuracy: Grade A (2%-1%-2%); Grade 2A (0.5% F.S.); Grade
3A (0.25% F.S.) with mirrored scale.
Pressure Limit: 150% of full scale. Gage will maintain its
specifications for overpressures up to 150% maximum range.
Normal operation should be between 25% and 75% of full scale.
Temperature Limits: -65 to 180˚F (-53.9 to 82.2˚C).
Sizes: 4 1/2˝ dial face (114.3 mm), 6˝ dial face (152.4 mm), 8
1/2˝ dial face (215.9mm)- Design conforms to ASME B40.1.
Process Connections: Two 1/4˝ female NPT field selectable
back or bottom connection.
Weight: 4 1/2˝ dial face: 16.3 oz. (462.1 g); 6˝ dial face: 19.6 oz.
(555.6 g); 8 1/2˝ dial face: 27.3 oz. (773.9 g).
Standard Accessory: One 1/4˝ male NPT stainless steel plug.
DO NOT allow torque to be transmitted from block to the gage
case.
CALIBRATION TEST
Use a dead weight tester or certified test gage having accuracy of
1/4% or better for ASME Grade A gages, 0.1% or better for ASME
Grade 2A or 3A gages. The test gage range should be comparable
to the range of the Spirahelic ® gage being checked. Connect lines
from the two instruments to a tee and the third line from the tee to
a controllable source of pressure. Apply pressure slowly so
pressure equalizes throughout the system. Compare readings. If
gage being tested is found to need calibration, return it, freight
prepaid, to the address below.
MAINTENANCE
No lubrication or periodic servicing is required. Keep case exterior
and lens clean. Use only cleaners compatible with acrylic plastic.
REPAIRS
Field repair should not be attempted and may void warranty.
Gages needing calibration or other service should be returned
prepaid to:
Dwyer Instruments
Attn: Repair Department
102 Highway 212
Michigan City, IN 46360
Phone: 219/879-8000
Fax: 219/872-9057
Bulletin A-33
DIM "C" DIM "D" DIM "E"
5-3/8 (136.53) 4-41/64 (117.87) 4.940 (125.48)
5-3/8 (136.53) 4-41/64 (117.87) 4.940 (125.48)
5-3/8 (136.53) 4-41/64 (117.87) 4.940 (125.48)
7 (177.80) 6-5/16 (160.32) 6-1/2 (165.10)
9-5/8 (244.48) 8-29/32 (226.22) 9 (228.60)
STANDARD TOLERANCES UNLESS NOTED:
ALL DECIMAL DIMENSIONS ±.005
ALL ANGLES ±1°
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