To order a Duragauge (sample coding shown)
Select: 45 1279 RS* 04L XXX 0/2,000 psi
1. Dial size–4
1
⁄
2˝
2. Case type–1279
3. Bourdon tube and socket code
4. Connection–
1
⁄
4 NPT (02),
1
⁄
2 NPT (04), Lower (L), Back (B)
5. Optional features
6. Pressure range (see range tables on pages 10 & 11)
Table A – Case selection & mounting
Ring: Style
Dial Size Ordering Case Case: Material Material Mounting/Connection
(in) Code Type Finish Finish
4
1
⁄
2 (45) 1279
(1 )
Phenolic Threaded Stem– Lower or back
(Black) Reinforced Surface– Lower or back
Polypropylene Flush– Back: Specify X56
(Black)
4
1
⁄
2, 6, 8
1
⁄
2 (45)(60)(85) 1377 Aluminum Hinged Flush– Back
Black epoxy coating Steel Stem– Lower or back
Black wrinkle
enamel coat
4
1
⁄
2, 6, 8
1
⁄
2 (45)(60)(85) 1379
(1 )
Aluminum 4
1
⁄
2˝, 6˝ Threaded rein- Stem– Lower or back
Black epoxy coating forced polypropylene Surface– Lower or back
8
1
⁄
2˝ Hinged steel, black Flush– Back, specify X56
wrinkle enamel coat 8
1
⁄
2˝ standard
6 (45) 2462 Polypropylene Bayonet lock Stem– Lower or back
(fiberglass reinforced) Polypropylene Surface– Lower or back, specify XBF
(Black) (Black) Flush– Back, specify XBQ
6 (60) 1379
(1 )
Aluminum 6˝ Threaded rein- Flush– Lower or back
(high pressure) Black epoxy coating forced polypropylene Surface– Lower or back
How to Order
Ashcroft
®
Duragauge
®
Pressure Gauge
NOTES:
(1) Liquid-fillable or hermetically sealed when kit 101A202-01 (lower) or kit 101A203-01 (back) is ordered.
(2) For selection of the correct Bourdon system material, see the media application table on page 9.
(3) Use on applications where NACE MR-01-75 is specified for selection of the correct Bourdon system material.
(
*
) “S” denotes solid front case design
Table B – System, connection & location
Bourdon Tube & Tip Material
(2)
Tube & NPT Conn.
(all joints TIG welded except code“A”) Socket Socket Conn. & Location & Range Selection
Material
(2)
Code Case Style Code Code Code Limits (psi)
C510 Grade A Phosphor Bronze Tube
Brass (A) (S) Solid Front Vac./1000
Brass Tip, Silver Brazed (04)
1
⁄
2
4130 alloy steel 1018 steel (B) (S) Solid Front (STD) Lower (L) Vac./5000
316 stainless steel 1018 steel (R) (S) Solid Front (02)
1
⁄
4 Vac./20,000
316 stainless steel 316 stainless steel (S) (S) Solid Front (OPT) Back (B) Vac./20,000
K 500 Monel
®(3)
Monel 400 (P) (S) Solid Front Vac./30,000
Inconel 718
®
316 stainless steel (WW) (SH) Solid Front (09)
1
⁄
4 50,000/80,000/100,000
Herm. Sealed High Pres.
13
GAUGE ACCURACY
Duragauge gauges are made in accordance with ANSI B40.1 (Gauges, pressure and vacuum, indicating dial type – elastic element), Accuracy
Grade 2A (±0.5% of span). Because of hysteresis, the downscale accuracy of a 20,000 psi gauge (S) or (R) code is 1.2%.
Maximum pressure at which a gauge is continually operated should not exceed 75% of full scale range.
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