Pressure – kg/cm
2
and bar
Range
Figure Minor Outer scale
interval graduation in psi
0/1 0.1 0.01 0/14
0/1.6 0.2 0.02 0/22
0/2.5 0.5 0.02 0/35
0/4 0.5 0.05 0/55
0/6 0.5 0.05 0/85
0/10 1 0.1 0/140
0/16 2 0.2 0/220
0/25 5 0.2 0/350
0/40 5 0.5 0/550
0/60 5 0.5 0/850
0/100 10 1 0/1400
0/160 20 2 0/2200
0/250 50 2 0/3500
0/400 50 5 0/5500
0/600 50 5 0/8500
0/1000 100 10 0/14,000
0/1600 200 20 0/22,000
0/2500 500 20 0/35,000
0/4000 500 50 0/55,000
0/6000 1000 50 0/85,000
Vacuum
Range Figure interval Minor graduation
30/0 in. Hg 5 in 0.2 in
34/0 ft H
2
O 5 ft 0.5 ft
Range Tables
Ashcroft
®
Duragauge
®
Pressure Gauge
Pressure – psi
Range Figure interval Minor graduation
0/15 1 0.1
0/30 5 0.2
0/60 5 0.5
0/100 10 1
0/160 20 2
0/200 20 2
0/300 50 2
0/400 50 5
0/600 50 5
0/800 100 10
0/1000 100 10
0/1500 200 20
0/2000 200 20
0/3000 500 20
0/5000 500 50
0/6000 500 50
0/10,000 1000 100
0/20,000 2000 200
0/30,000 5000 200
0/50,000 5000 500
0/80,000 10,000 1000
0/100,000 10,000 1000
Compound
Figure interval Minor graduation
Range
in Hg psi in Hg psi
30˝ Hg/15 psi 5 3 0.5 0.2
30˝ Hg/30 psi 10 5 1 0.5
30˝ Hg/60 psi 10 10 1 1
30˝ Hg/100 psi 10 10 2 1
30˝ Hg/150 psi 10 20 5 2
30˝ Hg/200 psi 30 20 5 2
30˝ Hg/300 psi 30 50 5 2
30˝ Hg/400 psi 30 50 5 5
30˝ Hg/500 psi 30 50 5 5
30˝ Hg/600 psi 30 50 10 5
Combination
Range Figure interval Minor graduation
inner–psi outer–ft H
2
O psi ft H
2
O psi ft H
2
O
0/15 0/34 3 5 0.5 0.5
0/30 0/70 5 10 0.5 1
0/60 0/140 5 20 0.5 5
0/100 0/230 10 20 1 2
0/160 0/370 20 50 2 5
0/200 0/460 20 50 5 5
0/300 0/690 25 100 5 10
Compound – kg/cm
2
and bar
Range
Figure Minor Outer scale
interval graduation in psi
–1/0/1.5 0.2 0.02 30˝ Hg/20
–1/0/3 0.5 0.05 30˝ Hg/40
–1/0/5 0.5 0.05 30˝ Hg/70
–1/0/9 1 0.01 30˝ Hg/125
–1/0/15 2 0.02 30˝ Hg/215
–1/0/24 5 0.02 30˝ Hg/340
Vacuum – kg/cm
2
and bar
Range
Figure Minor Outer scale
interval graduation
–1/0 0.1 0.01 30˝ Hg
Retard
Range Figure interval Minor graduation
0/15 psi retard to 30 psi 1 psi-30 psi 0.25 psi-5 psi
0/30 psi retard to 60 psi 2 psi-60 psi 0.2 psi-10 psi
0/60 psi retard to 100 psi 2 psi-100 psi 0.5 psi-10 psi
30˝ Hg vac/75 psi 5˝ Hg/15 psi-150 psi 1˝ Hg/1 psi-5psi
retard to 150 psi
10˝ Hg vac/5 psi 2˝ Hg/1 psi 0.2˝ Hg/0.1 psi
retard to 30˝ Hg vac 30˝ Hg 5˝ Hg
retard to 30 psi 30 psi 5 psi
Metric Ranges
Standard Ranges
10
All Ashcroft dials have various
total graduation marks, figure inter-
vals and minor graduations. Stan-
dard dual scale metric ranges have
a dominant metric inner scale. The
outer scale is specified in psi.
Some examples are shown. Dura-
gauge gauges are made in accor-
dance with ASME B40.1 entitled,
“Gauges, Pressure, Indicating Dial
Type – Elastic Element,” Accuracy
grade 2A (±0.5% of span). The
accuracy of a retard range gauge
applies only to the expanded por-
tion of the scale. The error in the
compressed portion is –10% to
+20% of the span. Maximum
pressure at which a gauge is con-
tinually operated should not exceed
75% of full scale range. Consult
customer service in Stratford, CT
for non-standard dials.
Minor Graduations
Figure Intervals
Total Graduation
Graduations and figure intervals
(2 páginas)
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