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ASHCROFT
1490 Low Pressure Diaphragm Gauge

1490 Low Pressure Diaphragm Gauge

Product catalog summary

Overview: The Ashcroft® Type 1490 low pressure diaphragm gauge is designed for measuring low pressure and vacuum in non-corrosive gas environments. It features a sensitive diaphragm capsule and is suitable for pressures ranging from 10 in. H2O to 15 psi.

Material Specifications: The gauge is constructed with a glass-filled polysulfone case, beryllium copper diaphragm, and brass socket. Wetted materials include beryllium copper, brass, polysulfone, and RTV silicone.

Product Specifications:

Model Number: 1490
Accuracy: ±2-1-2% full scale (Grade A, ASME B40.100)
Dial Sizes: 2½˝ and 3½˝ diameter
Operating Temperature: –40 to 180°F
Proof Pressure: 150% of range
Burst Pressure: Up to 5 psi = 50 psi, Greater than 5 psi = 100 psi

Connection Options: Available in various sizes and types including 1/8 NPT, 1/4 NPT, and multiple hose barb options. Connection locations include lower, center back, top, 3 o’clock, and 9 o’clock.

Optional Features: Options include 1% accuracy, dial marking, stainless steel or paper tags, throttle plug or screw, U-clamp, and FlutterGuard™.

Applications: Suitable for use in vacuum pumps, gas leak detectors, air compressors, air filters, gas burners, gas measurement, vacuum ovens, suction regulators, and respirators.

Standard and Metric Ranges: The gauge supports a variety of pressure and vacuum ranges in both standard and metric units, with detailed intervals and graduations provided.

Ordering Information: The ordering code includes dial size, case type, wetted material, connection size and location, optional features, and standard pressure range.

Dimensions: Detailed dimensions are provided for both 2½˝ and 3½˝ dial sizes, including various connection and mounting options.

Catalog excerpts

S ASHCROFT Trust the shield.® Connection Size: Connection Location: Operating Temperature: • Glass-filled polysulfone case material, won’t rust or dent • Beryllium copper diaphragm • Brass socket • Wetted materials of beryllium copper, brass, polysulfone and RTV silicone The Ashcroft® Type 1490 low pressure diaphragm gauge is designed to measure pressure from 10 in. H2O to 15 psi, both positive and negative pressures. This gauge uses a very sensitive diaphragm capsule to measure low pressure and vacuum. The gauge is specifically designed for use whenever the pressure medium is a gas that is not corrosive to beryllium copper, brass, polysulfone and RTV silicone. The polysulfone case is suitable for intermittent or continuous service on natural gas provided a .013 throttle plug is installed in the socket. Typical applications are, but not limited to, vacuum pumps, gas leak detectors, air compressors, air filters, gas burners, gas measurement, vacuum ovens, suction regulators and respirators. PRODUCT SPECIFICATIONS Model Number: 1490 Accuracy: ±2-1-2% full scale (Grade A, ASME B40.100) Ranges: 10 in. H2O through 15 psi including vac. and compound Dial Size: 2V2" and 3V2" diameter Case Material: Black, glass filled polysulfone Socket Material: Brass Movement: Brass Sensing Element: Beryllium copper diaphragm Wetted Material: Beryllium copper, brass, polysulfone and RTV silicone Window: Polycarbonate, quarter turn bayonet style mounting Dial: Aluminum, white background, black figures and intervals. Pointer: Black, aluminum, fixed Vs NPT (01) 14 NPT (02) Vs' tubing hose barb (HD) 3/1e" tubing hose barb (HE) V4" tubing hose barb (HF) V4" O.D. polytube hose barb (HG) 10-32 2B female thread (HH) Lower (L) Center Back (B) Top (T) 3 o’clock (D) 9 o’clock (E) -40 to 1S0°F Proof Pressure: 150% of range Burst Pressure: Up to 5 psi = 50 psi Greater than 5 psi = 100 psi OPTIONAL FEATURES 1% Accuracy: XAN (1) A throttle plug must be installed in the socket whenever the gauge is used for intermittent or continuous service on natural gas. (2) U-clamp furnished when hose barb or female thread is specified. (3) Throttle plug not available with hose barb or female thread connections. (4) .020 throttle screw available with HH connection only. ISO 9001 REGISTERED FIRM BULLETIN DG-1490 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA Tel: 203-378-8281 • Fax: 203-385-0408 email: [email protected] • www.ashcroft.com All specifications are subject to change without notice. All sales subject to standard terms and conditions. © Ashcroft Inc. 2018 07/18

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1490 Low Pressure Diaphragm Gauge STANDARD RANGES STANDARD RANGES (Cont.) Figure Intervals Minor Graduation STANDARD METRIC RANGES Figure Intervals Minor Graduation Figure Intervals Minor Graduation Other ranges available on request. Consult factory. SELECTION TABLE Dial Size Type Code Desc. Code 25 Description Low Pressure Diaphragm Gauge Wetted Material Conn. Size & Type Beryllium Copper Brass Polysulfone RTV Silicone 1/8 NPT 01 1/4 NPT 02 1/8˝ I.D.Tubing Hose Barb(2,3) HD 3/16˝ I.D.Tubing Hose Barb(2,3) HE HF 1/4˝ I.D.Tubing Hose Barb(2,3) HG...

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S ASHCROFT Trust the shield.® U-clamp Option All specifications are subject to change without notice. All sales subject to standard terms and conditions. © Ashcroft Inc. 2018 07/18 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA Tel: 203-378-8281 • Fax: 203-385-0408 email: [email protected] • www.ashcroft.com

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