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Model F7-LPP Vertical Level Float Switch

Series 1241/1243/1244 Flanged Chamber

Series 205 Welded Construction

External Mount Pressures to 1250 psi (86 bar) at Temperatures to 650°F (343°C), Optional Explosion-Proof Enclosures, Hermetically Sealed Switches

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Long life and reliable operation is inherent in the design of the 205 series. The heavy duty welded carbon steel chamber provides a control to operate up to 1250 psi (86 bar) and process temperature up to 650°F (343°C), 400°F (205°C) at the electrical head assembly. The use of an external magnet reduces the possibility of magnetic particle build up inside the armature tube and subsequent loss of operation as may occur with the internal magnet repulsion design. Choice of construction provides equipment suitable for specific gravity as low as (0.75). Electrical requirements are met by use of hermetically sealed snap action or mercury switches in a variety of actions including SPST, SPDT, DPDT and DPST arrangements. Optional circuits are available for low current/voltage DC; high current DC; or high temperature applications. Check the current chart for the switch best suited for your application. Standard process connections are combination 1" NPT and 1" socket weld hubs. Flanged connections are offered as an option. Contact factory for ANSI B31.1.

Product Applications

Refineries, chemical plants, power generating stations, water treatment plants, mixing systems, scrubbers, accumulators, condensate recovery, industrial tanks and vessels.

Ordering

Grouped product items
Model	Description	Availability*	Qty	Price

Specifications

C1-75:: Minimum specific gravity 0.75. Process pressure 1250 psig (86 bar) @ 100°F (38°C), 650°F (343°C).*
Temperature Limit:: Ambient Temperature: 212° F (100°C); Process Temperature: up to 650°F (343°C).
*Heat fins (HF) and/or high temperature switches should be considered for process temperatures above 500°F (260°C).
Switch Type:: Snap action or mercury. See charts A and B.
Electrical Rating:: See charts A and B.
Wiring Connections:: G, WT or E enclosure, terminal block. EV enclosure 18" (460 mm) leads.
Process Connections:: Combination 1" NPT/socket weld hubs or flanges. See chart C.
Enclosures:: G, painted steel and aluminum; WT, painted steel, aluminum and neoprene; E, aluminum; EV, aluminum and neoprene.
Weight:: 205, 40 lb (18 kg); 207, 50 lb (22.7 kg); 208, 57 lb (25.8 kg).
Agency Approval:: UL.
: Suggested Specifications
Liquid level control shall be 205 (207) (208) Series with combination 1" NPT/socket weld hubs (flanged) process connections. Chamber shall be welded suitable for operation at 1250 psig (86 bar) at 100°F (38°C), 650°F (343°C) at a minimum specific gravity of 0.75. Circuits shall be (hermetically sealed) snap action (mercury) switch (SPST) (SPDT), (DPDT). Enclosure shall be general purpose (weatherproof) (explosion-proof) (explosion-proof - vapor-proof). Switch mechanism shall be gravity return and shall be activated by a stainless steel float.

Support Library

Approvals

Model Chart

EXAMPLE	205	WT	7810	10	C1	75		205-WT-7810-10-C1-75 Liquid Level Control, welded carbon steel chamber, weatherproof enclosure, SPDT snap switch, fixed deadband, automatic reset, side/bottom process connections, combination 1” NPT/socket weld hubs, minimum specific gravity 0.75, operating pressure 1250 psig (86 bar) at 650ºF (343ºC).
CONNECTION	205							Liquid level control
ENCLOSURE		G						General purpose, NEMA 1
		WT						Weatherproof, NEMA 3R, 4, 4X (Not CSA)
		E						Explosion-proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G (CSA approved Groups C, D, E, F, G only)
		EV						Explosion-proof, vapor proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G (CSA approved Groups C, D, E, F, G only)
CIRCUITS (for electrical circuits, See charts A & B below)			48XX					Single stage, mercury switch, see chart A.
			48XX	XX				Two stage, mercury switch, see chart A.
			78XX					Single stage, snap switch, see chart B.
			78XX	XX				Two stage, snap switch, see chart B.
			78XXHM					Hermetically sealed snap switch, see chart B.
			98XX					Single stage, high capacity DC snap switch, see chart B.
			98XX	XX				Two stage, high capacity DC snap switch, see chart B.
			10XX					Single stage, high temperature snap switch, see chart B.
			10XX	XX				Two stage, high temperature snap switch, see chart B.
CHAMBER MATERIAL								Refer to chart C below for pressure/temperature ratings
					C1			Carbon steel body
					HFC1			Heat fins carbon steel body
MINIMUM SPECIFIC GRAVITY						75		0.75 specific gravity
OPTIONS							STW	SS tag wired
							01	Breather only (E-Housing only)
							02	Drain only (E-Housing only)
							12	Breather and drain (E-Housing only)
							23720	Fungus proofing special 23720

CHARTS A & B - ELECTRICAL CIRCUITS AND RATINGS

SWITCH TYPE	SWITCH ACTION	ELECTRICAL RATINGS IN AMPS					ORDERING CODE
		AC			DC		SINGLE STAGE	TWO STAGE
		120V	240V	440V	125V	250V	SINGLE STAGE	LOWER	UPPER
CHART A Mercury Contacts	SP-ST open on level FALL	10	5	3†	10	5	-4821	-4821	-21	UL
	SP-ST open on level RISE	10	5	3†	10	5	-4820	-4820	-20	UL
	SP-DT one switch	4	2	1†	4	2	-4810	-4810	-10	UL
	SP-DT two switches E.I.*	10	5	3†	10	5	-4815	-4815	-15	UL
	DP-ST two switches E.I.* open on level FALL	10	5	3†	10	5	-4813	-4813	-13	UL
	DP-ST two switches E.I.* open on level RISE	10	5	3†	10	5	-4814	-4814	-14	UL
	DP-DT two SP-DT switches	4	2	1†	4	2	-4806	-4806	-06	UL
CHART B snap action contacts	SP-DT one switch	12	5	3†	0.5**	0.25**	-7810	-7810	-10	UL
	DP-DT Two SP-DT switches	12	5	3†	0.5**	0.25**	-7806	-7806	-06	UL
	SP-DT one hermetically sealed switch***	5	5		5**		-7810HM	-7810HM	-10HM
	DP-DT two hermetically sealed SP-DT switches***	5	5		5**		-7806HM	-7806HM	-06HM
	DP-DT two SP-DT switches	10	3		10‡	3‡	-9806	-9806	-06
	SP-DT one switch	10	3		10‡	3‡	-9810	-9810	-10

†Available on special order, change 1st digit in ordering code from 4 to 5 or 7 to 8, i.e., -4820 becomes -5820, -7810 becomes -8810, etc.
‡10 amp inductive (polarized) at 125 VDC.
*Electrically Independent.
**Resistive.
***30VDC = 5 resistive.

CHART C

SERIES	MOUNTING STYLE	MINIMUM SPECIFIC GRAVITY	PRESSURE RATING AT		FLANGE CLASS (psi)	ORDER CODE
SERIES	MOUNTING STYLE	MINIMUM SPECIFIC GRAVITY	38°C 100°F	400°F 650°C	FLANGE CLASS (psi)	ORDER CODE
205	1" NPT	0.75	1250 psi 86 bar	1250 psi 86 bar	--	C1-75
207 208	FLANGED	0.75	275 psi 19 bar	100 psi 7 bar	150	C1-175
207 208	FLANGED	0.75	720 psi 50 bar	425 psi 29 bar	300	C1-375
207 208	FLANGED	0.75	1250 psi 86 bar	1030 psi 71 bar	600	C1-675

FAQ

Questions

Question

Why is the minimum specific gravity important on the float level switches?

Answer

If a medium has a lower s.g. than the rated minimum for a float, the float will sink through the media and the switch will not operate.

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