Submittal Sheet

• 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
T
he Ashcroft
®
T
ype 1490 low pressure
diaphragm gauge is designed to measure
pressure from 10 in. H
2
O 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. H
2
O through 15 psi
including vac. and compound
Dial Size: 2
1
⁄ 2˝ and 3
1
⁄ 2˝ 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
Connection
Size:
1
⁄ 8 NPT (01)
1
⁄ 4 NPT (02)
1
⁄ 8˝ tubing hose barb (HD)
3
⁄ 16˝ tubing hose barb (HE)
1
⁄ 4˝ tubing hose barb (HF)
1
⁄ 4˝ O.D. polytube hose barb (HG)
10-32 2B female thread (HH)
Connection
Location: Lower (L)
Center Back (B)
Top (T)
3 o’clock (D)
9 o’clock (E)
Operating
Temperature: –20 to 180°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
Dial Marking: XDA
Stainless
Steel Tag: XNH
Paper Tag: XNN
Throttle Plug:
(1)(3)
XTU
Throttle Screw:
(4
)
XTS
U-clamp:
(2)
XUC
FlutterGuard
™
: XZY
(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.
Type 1490 Low Pressure Diaphragm Gauge
Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA
Tel: [phone] • Fax: [phone]
email: [e-mail] • www.ashcroft.com
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
© Ashcroft Inc. 2010 06/10
BULLETIN DG-1490
Ash Bul DG-1490:layout 6/24/10 8:37 AM Page 1