BULLETIN DU-2 1377

• 41⁄2˝ full-size Bourdon tube

• Patented Duratube™ with as-welded-tube construction controls stress forlonger life

• “Round Cap Tip” construction lowersstresses for longer life

• Micrometer adjustable pointer.

• Exclusive Teflon coated 400 SS rotarymovement for longer life

• PLUS!™ Performance Option:- Liquid-filled performance in a dry gauge- Fights vibration and pulsations without

liquid-filled headaches- Order as option XLL

• Epoxy-coated system for superior corrosion resistance

Type 1377 Duragauge® pressure gaugeis offered in 41⁄2˝, 6˝ and 81⁄2˝ dial sizes.Designed for flush mounting, this solid-

front gauge is ideal for panel board applica-tions. Its black epoxy coating and its toughaluminum weatherproof case easily allow application in a variety of climatic conditions.

Weather Protection: Dry Case: IP54Window: GlassDial: Aluminum, white background,

black pressure scale.Pointer: Micrometer adjustableMovement: Rotary, 400 SS, Teflon® coated

pinion gear and segmentBourdon Tube: C510 Phos. bronze/brass(A)(1) 316L SS/steel (R)(2)

316L SS/316L SS (S)(2)

K Monel/Monel (P)(2)

ConnectionSize: 1⁄4˝, 1⁄2˝ NPTConnectionLocation: Lower or backPRODUCT OPTIONSPLUS!™ Performance: XLLFill: Dry Only Receiver Gauge:XPRShatter ProofGlass Window: XSGAcrylic Window: XPDSet Hand: XSHMaximum Pointer: XEP(1) Joints silver brazed(2) Joints welded

PRODUCT SPECIFICATIONSModel Number: 1377Accuracy: 1⁄2% full scale (Grade 2A,

ASME B40.100)Ranges: Vacuum – 30,000 psiDial Size: 41⁄2˝, 6˝, 81⁄2˝ diameter Case Material: Aluminum, black epoxy coatedRing: Hinged steel, black enamelBack Cover: 300 SS

Type 1377 Duragauge® Pressure Gaugewith PLUS!™ Performance Option

Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USATel: 203-378-8281 • Fax: 203-385-0408email: info@ashcroft.com • www.ashcroft.com

All specifications are subject to change without notice. All sales subject to standard terms and conditions. © 2017 Ashcroft Inc. Rev. A 06/17

Pressure – psi

Range Figure Minor interval Graduation

0/15 1 0.10/30 5 0.20/60 5 0.50/100 10 10/160 20 20/200 20 20/300 50 20/400 50 50/600 50 50/800 100 100/1000 100 100/1500 200 200/2000 200 200/3000 500 200/5000 500 500/6000 500 500/10,000 1000 1000/20,000 2000 2000/30,000 5000 200

CompoundFigure Interval Minor GradsRangein Hg psi in Hg psi

30˝ Hg/15 psi 5 3 0.5 0.230˝ Hg/30 psi 10 5 1 0.530˝ Hg/60 psi 10 10 1 130˝ Hg/100 psi 10 10 2 130˝ Hg/150 psi 10 20 5 230˝ Hg/200 psi 30 20 5 230˝ Hg/300 psi 30 50 5 2

STANDARD RANGE TABLE*

VacuumRange Figure Interval Minor Grads

30/0 in. Hg 5 in 0.2 in34/0 ft H2O 5 ft 0.5 ft

*Full standard and metric equivalent range tableavailable on our web site.

Note: Other than discoloration of the dial and hardening of thegasketing that may occur as ambient or process temperaturesexceeds 150°F, non-liquid-filled gauges with standard glass win-dows, can withstand continuous operating temperatures up to250°F (121°C). Accuracy at temperatures above or below thereference ambient temperature of 68°F (20°C) will be affected byapproximately .4% per 25°F. Gauges with welded joints will with-stand 750°F (450°F (232°C) with silver brazed joints) for shorttimes without rupture, although other parts of the gauge will bedestroyed and calibration will be lost. For continuous use and forprocess or ambient temperatures above 250°F (121°C), adiaphragm seal or capillary or siphon is recommended.

TEMPERATURE LIMITSAmbient Process Storage

Dry –20/200°F(1) –20/250°F(1) –40/250°F(–29/93°C) (–29/121°C) (–40/121°C)–40/150°F –40/200°F –40/150°FPLUS! (–40/66°C) (–40/93°C) (–40/66°C)

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A

3 Mounting studs CC threadedequally spaced on E dia. B.C.

T

G

PD

B

C

S

B

T

FMHole in panel

Nuts & washersnot supplied by Ashcroft

H

KLL

B

D

Nuts & washersnot supplied byAshcroft

C

S

T

F

MHole in panel

H

KLL

UA

G

3 Mounting studs CC threadedequally spaced on E dia. B.C.

41⁄2˝ & 6˝ Lower Conn. 41⁄2˝ & 6˝ Back Conn. 81⁄2˝ Lower Conn. 81⁄2˝ Back Conn.

Type 1377 Duragauge® Pressure Gaugewith PLUS!™ Performance Option

Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USATel: 203-378-8281 • Fax: 203-385-0408email: info@ashcroft.com • www.ashcroft.com

All specifications are subject to change without notice. All sales subject to standard terms and conditions. © 2017 Ashcroft Inc. Rev. A 06/17

Dimension

DialSize A B C D E F G H K M P S T U CC LL WeightInches (lbs)

41⁄2 6 53⁄8 315⁄16 47⁄8 #10-24 2.5 DRY(152) (137) (100) (124)66 79⁄16 27⁄8 43⁄4 11⁄16 7 15⁄8 41⁄2 13⁄8 11⁄16 61⁄2 21⁄8 5⁄8 5⁄8 3⁄4 1⁄4–20

1⁄8–1⁄2 2.5 DRY(192) (73) (121) (27) (178) (41) (114) (35) (27) (165) (54) (16) (16) (19) (3)(13)

81⁄2 101⁄16 95⁄8 6 9 1⁄4–20 4 .5 DRY(257) (244) (152) (229)

BULLETIN DU-2 1377

45 1377 S S 04 L XSG 100 #

Order Coding Example

SIZE TYPE SYSTEM (TUBE & SOCKETTube Socket

CASE DESIGNSOLID FRONT

PROCESSCONNECTION SIZE

CONNECTIONLOCATION

OPTIONS (X VARIATIONS)(1)

RANGEENGINEERING

UNITS(1)

(45)4½

(60)6

(85)8½

1377 (A) Phos. Bronze Brass(P) K-Monel Monel 400(R) 316 SS 1019(S) 316 SS 316 SS

(S) Solid Front (02) 1/4 NPT male(1)

(04) 1/2 NPT male(1)

(09) 9/16-18 UNF-2BAminco (standard for high pressure>20,000psi)

(1) Max pressure 20,000psi

(B) Back

(D) Side (3:00)

(E) Side (9:00)

(L) Lower

(T) Top (12:00)

(NH) St. St. Wired Tag

(TS) Throttle screw(2)

(6B) Oxygen service

(PD) Acrylic window

(SG) Safety glass

(EP) Maximum pointer,adjustable

(SH) Red set hand, stationary

(LL) PLUS! Performance

(56) Flush mounting ring

(C4) Individual calibration chart(1) Others on request(2) Standard with hermeticallysealed or liquid filled gauge

See website for most

common rangesoffered

(#) PSI

(BR)) Bar

(KG) Kilograms/CM2

(KP) Kilopascal

(IMV) Inches of MercuryVacuum

(1) See website for moreunits of measure

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