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A4A
Operating Manual
20 pgs1.19 Mb0
Specifications
4 pgs1.11 Mb0
User Manual
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Ashcroft A4A Specifications

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Page 1
Data Sheet
A4A Precision Pressure Gauge
FEATURES
 Mirror-band dial and knife-edge pointer to eliminate
parallax error
 Ranges from Vacuum to 100,000 psi, gauge, absolute
and compound pressure
 Solid-front protective case  Optional temperature-compensated movement
significantly reduces temperature error
 Test Laboratories  Precision Test and Measurement Validation  Calibration Laboratories
SPECIFICATIONS
Accuracy:
Ranges:
Sizes: 6˝, 8½˝, 12˝ or 16˝
Process Connection: ¼ NPT Female – bottom
Pointer:
Pointer Travel: 350°: up to 30,000 psi
Dial: Zero adjustable aluminum, white background,
Repeatability: ±0.02% of span Hysteresis:
Sensitivity: 0.01% of span
±0.1% of span (ASME B40.100 Grade 4A) (includes NIST Traceable Calibration Certification)
Gauge, Absolute and Compound ranges up to 100,000 psi
1
⁄8 NPT Male or Female – back or bottom
¼ NPT Male or Female – back or bottom
9
⁄16-18 UNF-2B Female for ¼ HP tubing MS33649-4 Female only – back or bottom MS33656-4 Male only – back or bottom MS-16142 Female only – back or bottom Mil-G-18997D Male only – back or bottom
Black painted aluminum knife edge tip
300°: 40,000 to 50,000 psi 270°: 60,000 thru 100,000 psi
black numerals with polished mirror band
<0.1% of span Hysteresis may exceed +/- 0.1% of span for ranges equal to or greater than 75,000 psi. +/- 0.3% typical not to exceed
0.04% of span.
A4A
6˝, 8½˝, 12˝ or 16˝ dial sizes
KEY BENEFITS
• High accuracy for precision pressure measurement
• Many process connection options
• Dual engineering unit scale optional
WETTED COMPONENTS
Bourdon Tube Process Connection
0/15 psi through 0/40 psi: Beryllium copper
0/50 psi through 0/100,000 psi: 403 SS
NON-WETTED COMPONENTS
Case Enclosure Rating
Cast aluminum, solid front, blow out
rear cover; Integral panel mounting
flange
Case is not sealed, recommended
for weather protected environment
303 SS
only
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
©2018 Ashcroft Inc. A4A _gauge_ds_ RevB_Ltr_0 5-07-19
of 41
ashcroft.com
info@ashcroft.com
1.800.328.8258
Page 2
Data Sheet
A4A Precision Pressure Gauge
ORDERING CODE Example:
Model Code/Dial Size
A4A-D - 6˝ dial A4AD A4A-E - 81/2˝ dial A4A-F - 12˝ dial A4A-G - 16˝ dial
Process Connection Size/Location
A - 1/8 Male NPT back B - ¼ Male NPT back C - 1/8 Female NPT back D - ¼ Female NPT back E - 9⁄16-18 Thread back F - MS-33656-4 Male back G - MS-33649-4 Female back J - 9⁄16-18 UNF3A Male back K - 1/8 Male NPT bottom L - ¼ Male NPT bottom L M - 1/8 Female NPT bottom N - ¼ Female NPT bottom P - 9⁄16-18 Thread bottom R - MS-33656-4 Male bottom S - MS-33649-4 Female bottom T - ¼-16 Thread Male bottom U - 9⁄16-18 UNF3A Male bottom X - MS-16142 9⁄16-18 Female bottom Z - MS-16142 9⁄16-18 Female back
Pressure Type
G - Gauge G A - Absolute V - Vacuum C - Compound
Tube Material
J - Berillium copper (up to 40 psi) V - 403 SS (50 psi and greater) V
Pressure Range
15 - 15 psi 20 - 20 psi 25 - 25 psi 30 - 30 psi 40 - 40 psi 50 - 50 psi 60 - 60 psi 75 - 75 psi 100 - 100 psi 150 - 150 psi 200 - 200 psi 250 - 250 psi 300 - 300 psi 400 - 400 psi 500 - 500 psi 600 - 600 psi 750 - 750 psi 1000 - 1,000 psi 1500 - 1,500 psi 2000 - 2,000 psi 2500 - 2,500 psi 3000 - 3,000 psi 4000 - 4,000 psi 5000 - 5,000 psi 6000 - 6,000 psi 7500 - 7,500 psi 10000 - 10,000 psi 15000 - 15,000 psi 20000 - 20,000 psi 25000 - 25,000 psi 30000 - 30,000 psi 40000 - 40,000 psi 50000 - 50,000 psi 50000 60000 - 60,000 psi (available in 81/2˝, 12˝ or 16˝) 75000 - 75,000 psi (available in 81/2˝, 12˝ or 16˝) 100000 - 100,000 psi (available in 81/2˝, 12˝ or 16˝)
Optional Features (if choosing an option(s) must include an “X”) -X__
C - Slotted link C D - Temperature compensated E - Special calibration F - Special scale G - Dual scale H - Special cleaning for oxygen service I - 6˝ Peak load indicator J - 81/2˝ Peak load indicator K - 12˝ Peak load indicator L - 16˝ Peak load indicator M - 6˝ Wall mount N - 8½˝, 12˝or 16˝ Wall mount W - Special cleaning, O2 clean, do not apply warning labels
A4A-D
L G V 50000 -XC
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
©2018 Ashcroft Inc. A4A _gauge_ds_ RevB_Ltr_0 5-07-19
of 42
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Page 3
Data Sheet
A4A Precision Pressure Gauge
STANDARD RANGES
inHg inH20 mmHg
-30 to 0 - -
Vacuum
0-30 - -
0-40 - -
0-50 - -
0-60 - -
0-75 - -
- 0-450 -
- 0-500 -
- 0-600 -
- 0-750 -
- 0-800 -
- - -
0-100 - -
0-125 - -
0-150 - -
0-200 - -
0-250 - -
0-300 - -
Positive Pressure
0-400 - -
0-500 - -
0-600 - -
0-750 - -
- - 0-760
0-1000 - -
- - 0-1000
- - 0-1250
- - 0-1500
- - 0-2000
- - 0-2500
- - 0-3000
- - 0-4000
- - 0-5000
STANDARD RANGES
bar
2
kg/cm kp/cm
Vacuum
-1 to 0 - -
0.2-1 - -
0-1 0-100 -
0-1.6 0-160 -
0-2 0-200 -
0-2.5 0-250 -
0-3 0-300 -
0-4 0-400 -
0-5 0-500 -
0-6 0-600 -
0-7.5 0-750 -
0-10 0-1000 0-1
0-12 0-1200 0-1.50
0-16 0-1600 0-1.6
0-20 0-2000 0-2
0-25 0-2500 0-2.5
0-30 0-3000 0-3
0-40 0-4000 0-4
0-50 0-5000 0-5
0-60 0-6000 0-6
0-75 0-7500 0-7.5
Positive Pressure
0-100 0-10000 0-10
0-125 - 0-12.5
0-160 - 0-16
0-200 - 0-20
0-250 - 0-25
0-400 - 0-40
0-500 - 0-50
0-600 - 0-60
0-750 - 0-75
0-1000 - 0-100
0-1250 - 0-125
0-1600 - 0-160
0-2500 - 0-250
0-4000 - 0-400
0-6000 - 0-600
0-7000 - 0-700
kPa mPa Notes
2
Available in 8½”, 12” or 16.” Dial face diamerts only
Available in 8½”, 12” or 16.” Dial face diamerts only
Available in 8½”, 12” or 16.” Dial face diamerts only
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
©2018 Ashcroft Inc. A4A _gauge_ds_ RevB_Ltr_0 5-07-19
of 43
ashcroft.com
info@ashcroft.com
1.800.328.8258
Page 4
Data Sheet
A4A Precision Pressure Gauge
DIMENSIONS in [ ] are millimeters
For reference only, consult Ashcroft for specific dimensional drawings
FRONT VIEW
PANEL MOUNTINGSIDE VIEW WALL MOUNTING
Dial Size
Dial Size
(inches)
6˝
8½˝
12˝
16˝
*Standard Process Connection: ¼ NPT Female Back Connection for ranges up to and including 10,000 psi AMINCO 45-11310 or AUTOCLAVE F-250-C for ranges over 10,000 psi
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
©2018 Ashcroft Inc. A4A _gauge_ds_ RevB_Ltr_0 5-07-19
A B C D E E1 E2 FM FF G HF HM J K L
77/8
[200]7[177.8]6½[165.1]7[177.8]2[50.8]
105/16
[261.9]
1321/32
[346.9]
1723/32
[450.1]
Pressure Connection* (P) Pressure Connection is illustrated in both back and bottom configurations
Approximate Weight
93/8
[238.1]
12¾
[329.9]
16¾
[425.2]
8 5/16
[228.6]9½[241.3]2[50.8]
123/8
[314.3]9½[241.3]2[50.8]
163/8
[415.9]9½[241.3]3¼[82.6]
Dial Size (inches) 6˝ 8½˝ 12˝ 16˝
Net Weight (lbs) 4½ 7¾ 10¾ 14¼
Shipping Weight 7 10 15 21
17/8
[47.6]1¼[31.8]
17/8
[47.6]1¼[31.8]
17/8
[47.6]1¼[31.8]
15/16
[33.3]
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49/16
[115.8]4¼[107.9]3¼[82.3]
543/64 [144]
543/64 [144]
163/64
[50.4]
59/16
[141.3]5¼[133.4]
523/64
[136.1]3¼[82.3]
523/64
[136.1]3¼[82.3]
325/64
[86.1]
11/16 [27]
11/16 [27]
11/16 [27]
11/16 [27]
13/8
[34.9]
13/8
[34.9]
13/8
[34.9]
13/8
[35.0]
327/32
[97.6]
41/32
[102.4]
41/32
[102.4]
41/16
[103.1]
5
/8
[15.9]
5
/8
[15.9]
5
/8
[15.9]
41/64
[16.3]
215/32
[62.7]
221/32
[67.4]
221/32
[67.4]
221/32
[67.4]
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