Pressure Vessels Selection Guide

Need help picking out a pressure vessel? Visit our new Pressure Vessels Selection Guide.

Customer Service

Contact us to place an order or inquire about any of our products and services.

Parr Instrument Company 211 Fifty Third Street
Moline, Illinois 61265-1770
(800) 872-7720 or
(309) 762-7716
Fax: (309) 762-9453

Pressure Gages

Gages for Parr pressure vessels can be furnished with either 3-1/2 inch or 4-1/2 inch dials in any of the ranges shown in the table below. All have stainless steel Bourdon tubes and 1/4 inch NPT male connections. Alloy 400 gages are available on special order. Accuracy is .5% of full scale for the 4-1/2 inch size and 1 percent for the 3-1/2 inch gages. All are calibrated in both pounds per square inch (psi) and bars. Gages in Pascal units are available on special order. Compound gages which show vacuum to 30 inches of Mercury and positive pressures to 300 psi/20 bar are also available.

When ordering a special gage, specify the gage diameter, the desired range and scale units.

The gage on a pressure vessel should be 150 percent of the maximum operating pressure. This allows the gage to operate in the most accurate pressure range and prevents the gage from being stressed repeatedly to its full range, which will effect the calibration.

Pressure Gages
Pressure Range psi Pressure Range bar 4-1/2″ Dia. Gage No. 3-1/2″ Dia. Gage No. 3-1/2″ Dia. Back Mount Gage No.
0-100 0-14 56HCPA 593HCP1AD 2633HCP1AD
0-200 0-28 56HCPB 593HCP2AD 2633HCP2AD
0-600 0-40 56HCPC 593HCP6AD 2633HCP6AD
0-1000 0-70 56HCPD 593HCPD 2633HCP10AD
0-2000 0-140 56HCPF 593HCPF 2633HCP20AD
0-3000 0-210 56HCG 593HCPG 2633HCP30AD
0-4000 0-280 NA 593HCP40AD
0-5000 0-350 56HCPH 593HC50AD
0-7500 0-517 56HCP75AD NA
0-10000 0-700 56HCPK NA
30″ Hg Vac/300 psi 56HCP3YB 593HCP3YB 2633HCP3YB
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