Ashcroft G, L Specifications

237

Nominal Ranges and Deadbands
Pressure and Temperature
Switches, L- and G-Series

PRESSURE/VACUUM SWITCHES

Overpressure Approximate Deadband

Nominal Range

Vacuum

(1)

Proof psi

Ratings

LPA-GPA

Minimum

Burst psi

Switch Element

J, H G J, H K, F P GG JJ, HH KK,FF PP

(3)

LPS-GPS

(4)

(2)

Switch Element (Buna-N Diaphragm)

LPD-GPD

(4)

–30 in.Hg –760 mmHg 250 400 6-24 2.5-4 4-6 1-2 1-2.5 3-5.5 4-6.5 1-2 1-2.5

Compound

–30 in.Hg/ –760 mmHg/
15 psi

Pressure

30 in.H
60 in.H
100 in.H
150 in.H
15 psi 1 kg/cm
30 psi 2 kg/cm
60 psi 4 kg/cm
100 psi 7 kg/cm
200 psi 14 kg/cm
400 psi 28 kg/cm
600 psi 42 kg/cm
1000 psi
2000 psi 140 kg/cm
3000 psi 210 kg/cm

250 400 6-24 2.5-4 4-6 1-2 1-2.5 3-5.5 4-6.5 1-2 1-2.5

0 1.0 kg/cm2 3-12 1-2.5 1-3.5 0.5-1.5 0.5-2 1.5-3.5 1.5-4 1-2 1-2

O 750 mmH2O 20 35 4.0-27 1.5-3.5 2.0-4.0 0.5-1.0 0.7-2.0 2.1-4.9 2.8-5.6 0.7-1.4 0.7-2.8

2

O 1500 mmH2O 20 35 5.0-54 1.5-4. 2.5-5.0 0.5-1.4 1.0-2.5 3-5.6 3.5-7.0 0.7-2.0 2-3.5

2

O 2500 mmH2O 20 35 8.5-90 2.0-5.5 4.0-8.5 1.0-2.0 1.4-3.0 4-7.7 5.6-11.7 1.4-2.8 2-4.2

2

O 3750 mmH2O 20 35 18-135 5.0-11 10-18 1.5-3.0 2.0-6.0 7.0-16 14-25.1 2.1-4.2 5-9.2

2

(10)

2

500 1500 2.5-13 1.0-1.5 1.0-2.5 0.5-1.0 0.75-1.5 1.4-2.1 1.4-3.5 .7-1.4 1-1.4

2

500 1500 3.0-27 1.0-2.8 1.0-3.2 .75-1.5 1-1.8 1.4-5 3-6 1-2.1 1.4-2.5

2

500 1500 5.0-54 2.0-4.0 2.0-4.5 1.0-2.0 1.0-2.5 3-7 4-8 1.4-2.8 1.4-3.5

2

1000 3000 10-90 3-6 5.0-10 1.0-2.5 1.4-3.2 7-12 7.0-14 1.4-3.5 3-7

2

1000 3000 18-180 7-14 10-18 1.0-4.0 5.0-8.0 10-23 14-25 1.4-5.6 7.0-11.2

2

2400 3000 45-360 16-30 16-45 4.0-8.0 5.0-15 22-42 22-63 5.6-11.2 7.0-21

2

2400 3000 75-540 16-50 20-75 5.0-15 6.0-25 22-70 28-105 7.0-21 8.0-35

70 kg/cm2 12000 14000 160-900 75-130 50-160 7.0-30 10-85 70-180 70-223 10-42 14-119

2

12000 14000 350-1800 150-200 150-350 20-50 25-110 209-279 209-488 28-70 35-154

2

12000 14000 400-2600 180-250 180-400 30-70 30-190 251-349 251-558 42-98 42-226

DIFFERENTIAL PRESSURE SWITCHES

Overpressure Approximate Deadband

Nominal Range

(1)

Static psi

Ratings

LDA-GDA

Minimum

Proof psi

Switch Element

J, H G J, H K, F P GG JJ, HH KK,FF PP

(3)

LDS-GDS

(4)

(2,7)

Switch Element (Buna-N Diaphragm)

LDD-GDD

(4)

Pressure

Od 750 mmH2O 5.4 21.6 4.0-27 1.5-3.5 2.0-4.0 0.5-1.0 0.7-2.0 2.1-4.9 2.8-5.6 0.7-1.4 0.7-2.8

30 in.H

2

60 in.H

Od 1500 mmH2O 5.4 21.6 5.0-54 1.5-4.0 2.5-5.0 0.5-1.4 1.0-2.5 2.5-6 3.5-7.0 0.7-2.0 2-3.5

2

100 in.H

Od 2500 mmH2O 5.4 21.6 8.5-90 4.0-5.5 4.0-8.5 1.0-2.0 1.4-3.0 5.6-7.7 5.6-11.9 1.4-2.8 2-4.2

2

150 in.H

Od 3750 mmH2O 5.4 21.6 18-135 5.0-11 10-18 1.5-3.0 2.0-6.0 7.0-15.4 14-25.2 2.1-4.2 2.8-8.4

2

30 psid 2 kg/cm
60 psid
200 psid 14 kg/cm
400 psid 28 kg/cm

2

500 2000 3.0-27 1.0-2.5 1.0-3.0 1.0-1.5 1.0-1.8 2-5 3-6 1-2.1 1.4-2.4

2

4 kg/cm

2

1000 4000 18-180 10-15 10-18 1.0-4.0 5.0-8.0 14-23 14-30 1.4-5.6 7.0-11.2

2

1000 8000 45-360 16-30 16-45 4.0-8.0 5.0-15 22.4-42 22.4-36 5.6-11.2 7.0-21.0

500 2000 5-54 2-4 2-4.5 1-2 1-2.5 3-7 4-8 1.4-2.8 1.4-3.5

TEMPERATURE RANGE SELECTION

Approximate Deadband

(3)

Adjustable Range Max. LTA-GTA

°F °C

–40 to 60 –40 to16 400 18-90 4.0-10 9.0-18 1.5-3 2-5 4-10 9.0-18 1.5-3 2-5
0 to 100
75 to 205
150 to 260
235 to 375
350 to 525

500 to 750

NOTES:

1. Switches may generally be set between 15% and 100%
of nominal range on increasing pressure. Consult fac
tory for applications where setpoints must be lower.

2. All deadbands are given in English units as shown in

the nominal range column. Deadbands shown are for
switches with Buna N diaphragm.
Approximate deadbands for optional diaphragms:

–20 to 40 400 30-90 5.0-15 10-30 1.5-5.5 3-7 5-15 10-30 1.5-4.5 3-7

(9)

(6)

20 to 95 400 34-120 6.0-18 10-34 3-5.5 3-8 6-18 10-34 3-5.5 3-8
65 to125 400 25-100 3-13 9.0-25 1.5-4 3-7 3-13 9.0-25 1.5-4 3-7
110 to 190 500 35-130 6-19 10-35 2-5.5 3-8 6-17 10-35 2-5.5 3-8
175 to 275 700 40-165 5-27 15-40 3-7 3.5-11 5-27 15-40 3-7 3.5-11
260 to 400 900 50-200 20-36 5-10 6-21 20-36 20-36 36-60 5-10 6-21

Temp.

Switch Element

°F

J, H G J, H K, F P GG JJ, HH KK,FF PP

Viton: Multiply Buna N value by 1.4
Teflon: Multiply Buna N value by 1.2
Stainless Steel: Multiply Buna N value by 1.7

­ Monel: Multiply Buna N value by 1.7

3. Deadbands for LTA, LPA and LDA are adjustable

between the values shown for all diaphragm materials.

4. Deadbands for LPS, LPD, LDS, LDD, LTD, and LDS

models are fixed within the range of values shown.

LTS-GTS

(8)

Switch Element

(4)

LTD-GTD

5. Switches can be set at increase or decrease through
out the nominal range.

6. Available with remote mount thermal system only.

7. Deadbands given are for zero static working pressure.

8. All deadbands given in °F.

9. Not available with 2

10. Proof pressure is 4000 psi with stainless steel and
monel welded diaphragms.

3

/4˝ stem.

(4)

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Consult factory for guidance in product selection
Phone [phone], Fax [phone] or
visit our web site at www.ashcroft.com