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September 2006 — Approval Guide Fuel & Combustion Controls

8-18

Model DFS-292*. Mount with diaphragm vertical. Operating ranges are adjustable except where noted as fixed. *Models with enclosures. ‡Models with suffix numbers -45, -46, -47 or -80 are equipped with one or two indicating lamps. Note: All the range set points are specified with manufacturing tolerance of 0.10 ±0.05, 0.08 ±0.03, 0.05 ±0.02 psig.

Henry G Dietz Co Inc, 14-26 28th Ave, Long Island City NY 11102 Models 114P, 116P, 161P1⁄4, 161P1, 161P1.3, 161P5, 161P10, 161P15. Switch capacity 15 A at 115 or 230 V ac.

Dresser Instruments, Dresser Inc, 250 E Main St, Stratford CT 06614 Ashcroft Cat. No. B420 or B720 (or 22* through 29, 32*, 42*, 50, 61, 62, 63, 64 or 66)B(or S**, P**, T or V)X(FM, CH, FV, JK, SQ or no suffix) positive or negative pressure actuated. The B4 Series provides NEMA 4 and NEMA 13 watertight, oiltight and dusttight enclosures. Available with adjustable pressure ranges from 30 in. Hg (-100 kPa) vacuum to 3000 psi (21,000 kPa) pressure. *Suitable for use in Class I, Division 2, Groups A, B, C, D hazardous locations. **Available with pressure ranges between 0 and 1000 psi (0 to 6895 kPa) only.

Ashcroft Cat. No. D420 (or 22* through 29, 32*, 42*, 50, 61, 62, 63, 64 or 66) B (or T** or V) X(FM, FT, BP, CH, FV, G5, HX, JK, MD, NF, 06, SQ, TA, UD, RN or no suffix) differential pressure actuated. The D4 Series provides NEMA 4 and NEMA 13 watertight, oiltight and dusttight enclosures. Available with adjustable differential pressure ranges from 1 to 150 in. (25 to 3810 mm) H2O and 2 to 600 psi (15 to 4135 kPa). *Suitable for use in Class I, Division 2, Groups A, B, C, D hazardous locations. **Not available with in. H20 (mm H20) range switches.

Karl DUNGS Inc, 524 Apollo Dr, Suite 10-30, Lino Lakes MN 55014 Models AA-A1-0-2 (or 3, 4, 6); AA-A2-4 (or 6)-2 (or 3, 4, 5, 6); AA-C2-4-1 (or 2, 3). The six-place model designation scheme (three letters – one letter plus one digit – one digit – one digit) has the following significance: Place

Character

1

A G

Air Gas

2

A M

Automatic Reset Manual Reset

3

O or Blank H L

4

A1, A2, C2 or A4

5

0 1 2 3 4 6

6

1 through 10

Meaning

No limit High limit Low Limit Switch ‘‘Family’’ No Electrical Protection (Designed for inside-enclosure mounting only) Minimal Electrical Protection Modest Electrical Protection (NEMA 1) Carbonate Cover, IP54, NEMA 12 IP54 or NEMA 12. Bottom Inlet, Test Button

Pressure ranges from 0.08 to 0.6 through 400 to 2400 inches of water column (0.02 to 0.15 through 99 to 597 kPa)

Dwyer Instruments Inc, Box 373, Michigan City IN 46360 Series 1637, 1821, 1822. For positive, negative or differential pressure. Series 1637 rated for 7/3.5 A at 120/240 V ac, 1821 rated for 2/1 A at 120/240 V ac, 1822 rated for 5/2.5 A at 120/240 V ac. Models 1637-1 (or 3, 6, 12 or 25); 1821 (or 22)-0.5 (or 1, 2, 5, 10, 20, 40 or 80). Models 1910 (1911, 1912*, 1913*, 1920, 1921, 1922*, 1923*)-000(-00, -0, -1, -5, -10 or -20)P(T or Z) for positive, negative or differential pressure. Contact ratings: range -000, 10 A at 240 V ac; all others 15 A at 125-480 V ac. Models 1638*(or 1639*)-0 (or -1, -2, -5 or -10) for positive, negative or differential pressure. Contacts rated for 15 A at 125-480 V ac. Models G1638* (or G1639*)-0 (or -1, -2, -5, -10) for positive, negative or differential pressure. Contact ratings: 1A at 125 V ac, .25A at 12 V dc. Models 1823(or 1824)-00(or -0, -1, -2, -5, -10, -20, -40 or -80) for positive, negative or differential pressure. Contacts rated for 15 A at 125-480 V ac. *Available with optional metric scale designated by M prefix and -CM or -kPa suffix in Model 0.6.

Series 1950 (or 1951, 1952)-000 (or 00, 02, 04, 0, 1, 5, 10, 20, P2, P8, P15, P25, P50)-1 (or 2, 3, 4, 5, 6 electrical capacity)-B (or N, S, V, F) airflow interlocking switches for positive, negative or differential operation. P50 range available for Series 1950 and 1952 only. Mount with diaphragm vertical. Available with field adjustable ranges of 0.03-0.10, 0.04-0.13, 0.07-0.15, 0.03-0.35, 0.15-0.5, 0.4-1.6, 1.4-5.5, 3-11 and 4-20 in. (0.76-2.54, 1-3.3, 1.8-3.8, 0.76-8.9, 3.8-12.7, 10.2-40.6, 35.6-139.7, 76.2-279.4 and 101.6-508 mm) H2O with max pressure of 45 in. (1143 mm) H2O, 0.5-2, 1.5-8, 3-15 and 4-25 psi (3.4-13.8, 10.3-55.2, 20.7-103.4 and 27.6-172.4 kPa) with max pressure of 35 psi (241 kPa), and 15-50 psi (103.4-345 kPa) with max pressure of 70 psi (483 kPa). Contact ratings for switch capacities 1 and 2: 15 A, 125/250/480 V ac, 1⁄8 hp (0.09 kW) 125 V ac, 1⁄4 hp (0.19 kW) 250 V ac; for switch capacities 3 and 4: 10 A, 125/250/480 V ac, 1⁄8 hp (0.09 kW) 125 V ac, 1⁄4 hp (0.19 kW) 250 V ac; and switch capacities 5 and 6: 1 A, 125 V ac SPDT switching action. Series 1950, 1951 and 1952 airflow interlocking switches are suitable for use in Class I, Division 1, Groups C and D; Class II, Division 1, Groups E, F and G and Class III hazardous locations.

FIREYE Inc, 3 Manchester Rd, Derry NH 03038 FMDL Series – Models FMDL 1ET, 3ET, 5ET, 10ET, 50ET, 3AT. Adjustable ranges 0.08-0.4 up to 1.0-20 in. H2O (0.2-1 to 2.5-50 mbar); max working pressure FMDL 1 and 3, 2.1 psi (150 mbar); all others 4.4 psi (300 mbar).

FM Approvals


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