14
Brass Case, Liquid Filled
300
SERIES
Dial Indicating Pressure Gauges
APPLICATIONS
Ŷ
Automotive
Ŷ
Construction
Ŷ
Hydraulics & pneumatics
Ŷ
Mining
Ŷ
Stamping & forming presses
Ŷ
Transportation
SERIES SPECIFICATIONS
Pressure
ranges 300 Series (all) Vacuum and compound ranges through 0 psi to
15,000 psi
Accuracy 25-300, 25-310 ± 1.6% full scale
40-300, 40-310 ± 1% full scale
Temperature
ranges
*
300 Series (all) Media -4 °F to 140 °F (-20 °C to 60 °C)
Ambient 0 °F to 160 °F (-18 °C to 71 °C)
Optional temperature ratings available from
-40 °F to 212 °F (-40 °C to 100 °C)
Measuring
element 25-300, 25-310
(600 psi) Copper alloy “C” tube
25-300, 25-310
(800 psi to 6,000 psi) Copper alloy coiled safety tube
25-300, 25-310
(7,500 psi to 15,000 psi) 316 stainless steel coiled safety tube
40-300, 40-310
(1,000 psi) Copper alloy “C” tube
40-300, 40-310
(15,000 psi) 316 stainless steel coiled safety tube
Connection 25-300, 25-310 1/4Ǝ NPT die-cast brass with the case. 7/16Ǝ – 20 SAE
adjustable type straight thread with FKM O-ring is also
available as a stock option on many ranges (-4 SAE).
40-300, 40-310 1/4Ǝ NPT die-cast brass with the case. 1/2Ǝ NPT is
available on certain 40-300 ranges as a stock option,
and on all other 40-300 and 40-310’s as a non-stock
option.
Case 300 Series (all)
Die cast brass (natural brass ¿ nish) with safety relief plug
Cover ring 300 Series (all) Polished brass
Lens 300 Series (all) Acrylic with o-ring seal
Pointer 300 Series (all) Balanced aluminum, black ¿ nish
Dial 300 Series (all) Aluminum, white background with black scale.
UV resistant.
Movement 300 Series (all) Brass and nickel-silver with highly polished bearing
surfaces
Fill liquid** 300 Series (all) Glycerine
•
High quality, heavy-duty liquid ¿ lled gauge
•
Vacuum and compound ranges through 0 psi to 15,000 psi
•
2-1/2" and 4" gauge sizes
•
Die cast brass case with natural brass ¿ nish
•
Copper alloy or 316 stainless steel and brass wetted parts
For details on accuracy/standard dial con¿ guration
and dial layouts, see pages 54-59.
OPERATING SPECIFICATIONS
1. Working Pressure Limitations
a. Dynamic Pressure
The working pressure should be
limited to 60% of the dial range.
b. Static Pressure
The working pressure, where no
sharp À uctuations occur, should be
limited to 90% of the dial range.
* For every 18 °F (10 °C) shift in temperature from which the gauge is calibrated, the user can
experience up to ±0.4% additional error.
** See page 53 for gauge ¿ ll options.
15
ORDERING
INFORMATION
DIMENSIONS
300 SERIES
40 – 300 – 3000 – psi – 1/4 – BP3
Gauge size .........................................................................4"
Case type ....................................Brass, bottom connection
Pressure range & scale option ................0 psi to 3,000 psi
Connection size .....................................................
1/4
"
NPT
Option ...................................Brass Press Fit Ori¿ ce 0.3 mm
EXAMPLE
ORDERING INFORMATION
GAUGE SIZES 25 2-1/2Ǝ40
4Ǝ
CASE TYPES 300 Brass, bottom connection 310
Brass, back connection
PRESSURE
RANGES 30vac -30 inHg to 0 psi 30/300 -30 inHg to 0 to 300 psi 300 0 psi to 300 psi 3000 0 psi to 3,000 psi
30/15 -30 inHg to 0 to 15 psi 15 0 psi to 15 psi 400 0 psi to 400 psi 5000 0 psi to 5,000 psi
30/30 -30 inHg to 0 to 30 psi 30 0 psi to 30 psi 600 0 psi to 600 psi 6000 0 psi to 6,000 psi
30/60 -30 inHg to 0 to 60 psi 60 0 psi to 60 psi 800 0 psi to 800 psi 7500 0 psi to 7,500 psi
30/100 -30 inHg to 0 to 100 psi 100 0 psi to 100 psi 1000 0 psi to 1,000 psi 10000 0 psi to 10,000 psi
30/160 -30 inHg to 0 to 160 psi 160 0 psi to 160 psi 1500 0 psi to 1,500 psi 15000 0 psi to 15,000 psi
30/200 -30 inHg to 0 to 200 psi 200 0 psi to 200 psi 2000 0 psi to 2,000 psi
SCALE OPTIONS psi psi single scale psi/kPa psi/kPa dual scale psi/kg/cm2
psi/kg/cm2 dual scale
psi/bar
psi/bar dual scale
CONNECTION SIZES 1/4 1/4Ǝ NPT 1/2 1/2Ǝ NPT SST
SAE J1926-3:7/16-20 Adjustable
OPTIONS CFF Chrome Front Flange RF Rear Flange GLO Glass Lens Overlay ST Stainless Steel Tagging
CFFN Chrome Front Flange w/o holes CCR Chrome Cover Ring SGO Safety Glass Overlay BT3 Brass Threaded Ori¿ ce 0.3 mm
BFF Brass Front Flange CBU Chrome Bezel & U-Clamp AR Adapter Ring BT4 Brass Threaded Ori¿ ce 0.4 mm
BLFF Black Front Flange MIP Maximum Indicating Pointer LM Laser Marking BT8 Brass Threaded Ori¿ ce 0.8 mm
SSRF 304SS Rear Flange LL Polycarbonate Lens
Please consult your local NOSHOK Distributor or NOSHOK, Inc. for availability and delivery information.
NOTE: Refer to 300 Series Options & Accessories chart on page 51 for availability by part number.
25-300 40-300 25-310
1.34"
(34 mm)
2.48"
(63 mm)
0.55"
(14 mm)
2.13"
(54 mm)
0.43"
(11 mm)
1.77"
(45 mm)
3.94"
(100 mm)
0.87"
(22 mm)
0.53"
(13.5 mm)
3.46"
(88 mm) 0.55"
(14 mm)
2.48"
(63 mm)
1.34"
(34 mm)
2.36" (60 mm)
16
Dimensions
Dial Indicating Pressure Gauges
40-300 Front Flange
40-310 Front Flange
25-310 Front Flange
25-300 Rear Flange
40-310 25-300 Front Flange
3.46" (88 mm)
1.77" (45 mm)
3.94"
(100 mm)
1.18"
(30 mm)
0.87"
(22 mm) 120°
3.35" (85 mm)
2.95" (75 mm)
0.14"
(3.6 mm)
1.38"
(35 mm) 0.08"
(2 mm)
0.55"
(14 mm)
2.48"
(63 mm)
2.09"
(53 mm)
0.43"
(11 mm)
0.20"
(5 mm)
5.20" (132 mm)
4.53" (115 mm)
120°
1.79"
(45.5 mm)
0.14"
(3.5 mm)
3.15"
(80 mm)
3.98"
(101 mm)
0.87"
(22 mm) 120°
3.35" (85 mm)
2.95" (75 mm)
0.14"
(3.6 mm)
2.48" (63 mm)
1.46"
(37 mm)
2.48"
(63 mm)
0.08"
(2 mm)
0.55"
(14 mm)
5.20" (132 mm)
0.20"
(5 mm)
120°
120°
4.53" (115 mm)
0.87"
(22 mm) 1.93"
(49 mm)
0.14"
(3.5 mm)
3.94"
(100 mm)
2.78"
(70.5 mm)
3.35" (85 mm)
2.95" (75 mm)
0.14"
(3.6 mm)
0.55"
(14 mm)
0.08"
(2 mm)
1.46"
(37 mm)
2.48"
(63 mm)
2.09"
(53 mm)
17
300 SERIES DIMENSIONS
40-310 Rear Flange
25-310 Chrome Triangular Bezel with U-Clamp 40-310 Chrome Triangular Bezel with U-Clamp
40-300 Rear Flange 25-310 Rear Flange
120°120°
120°
5.20" (132 mm)
4.57" (116 mm)
0.20"
(5 mm)
0.87"
(22 mm)
3.46"
(88 mm)
3.94"
(100 mm)
1.85"
(47 mm)
0.08"
(2 mm)
3.35" (85 mm)
2.95" (75 mm)
0.14"
(3.5 mm) 0.55"
(14 mm)
2.48"
(63 mm)
1.54"
(39 mm)
0.20"
(5 mm)
2.36" (60 mm)
5.20" (132 mm)
4.57" (116 mm)
0.20"
(5 mm)
0.08"
(2 mm)
1.85" (47 mm)
3.94"
(100 mm)
0.87"
(22 mm)
3.46" (88 mm)
1.18"
(30 mm)
2.36" (60 mm) 0.16"
(4 mm)
0.55"
(14 mm)
1.26"
(32 mm)
2.68"
(68 mm)
2.48"
(63 mm)
0.87"
(22 mm) 1.93"
(49 mm)
0.16"
(4 mm)
3.46" (88 mm)
3.94"
(100 mm)
1.18"
(30 mm)
4.21"
(107 mm)
