External Mount, Pressure to 1000 psig (69 bar) and Temperature to 475°F (246°C)

Heavy duty flanged chamber features removable float for ease of inspection and maintenance. The 221 Series also provides 1" NPT for standard external mounting. Socket weld hubs or flanges are optional. Rugged C1-75 construction is suitable for operation at 1000 psi (69 bar) at 100°F (38°C), and 850 psig (59 bar) at 475°F (246°C) with a minimum specific gravity of 0.75. C1-60 construction is suitable for operation at 600 psig (41 bar) at 100°F (38°C), and 550 psig (38 bar) at 475°F (246°C) with a minimum specific gravity of 0.60. Models featured can be ordered with various circuits including SPST, SPDT, or DPDT with hermetically sealed snap action or mercury contacts. A full range of enclosures are available including general purpose, weatherproof, explosion-proof, or explosion-proof – vapor proof.

Product Applications

Oil Refineries
Chemical Plants
Power Generating Stations
Pumping Stations
Heat Transfer Systems
Sanitary/Waste Water Facilities
Drip Legs
Hydraulic Systems
Boilers

More Information

Model Chart

EXAMPLE	221	WT	7810	C1	60		221-WT-7810-C1-60 Liquid Level Control, weatherproof enclosure, SPDT snap switch, fixed deadband, automatic reset, operating pressure 600 psig (41 bar) at 100°F (38°C), 550 psig (38 bar) at 475°F (246°C), side/bottom process connections, 1" NPT, minimum specific gravity 0.60.
CONNECTION	221						One Vertical and One Horizontal 1" NPT
	223						One Vertical and One Horizontal Flanged Connection
	224						Two Vertical Flanged Connections
	224T
ENCLOSURE		G					General Purpose, NEMA 1
		WT					Weatherproof, NEMA 3R, 4, 4X
		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, use heat fins (HF) if process temperature exceeds 350°F (177°C), do not exceed 450°F (232°C), see chart B
			98XX-XX				Two Stage, High Capacity DC Snap Switch, use heat fins (HF) if process temperature exceeds 350°F (177°C), do not exceed 450°F (232°C), see chart B
			10XX				Single Stage, High Temp. Snap Switch, continuous rating 800°F (425°C), see chart B
			10XX-XX				Two Stage, High Temp. Snap Switch, continuous rating 800°F (425°C), see chart B
CHAMBER MATERIAL				C1			Carbon Steel Body
				C216			316SS Body
				HFC1			Heat Fins & Carbon Steel Body
SPECIFIC GRAVITY					60		0.60 Specific Gravity (221 only)
					75		0.75 Specific Gravity (221 only)
					160		0.60 Specific Gravity & 150# Flange (223, 224 only)
					175		0.75 Specific Gravity & 150# Flange (223, 224 only)
					360		0.60 Specific Gravity & 300# Flange (223, 224 only)
					375		0.75 Specific Gravity & 300# Flange (223, 224 only)
					660		0.60 Specific Gravity & 600# Flange (223, 224 only)
					675		0.75 Specific Gravity & 600# Flange (223, 224 only)
OPTIONS						H2	H2 Socket Weld Hub (221, steel housing only)
						R	Manual Reset, Single Stage
						R1	Manual Reset, Lower Stage 2-Stage Control
						R2	Manual Reset, Upper Stage 2-Stage Control
						R3	Manual Reset, Both Stages 2-Stage Control
						STW	SS Tag Wired
						01	Breather Only (E-Housing only)
						02	Drain Only (E-Housing only)
						12	Breather & Drain (E-Housing Only)
						23720	Fungus Proofing

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	30V	125V	250V	SINGLE STAGE	LOWER	UPPER
CHART A Mercury Contacts	SP-ST open on level FALL	10	5	3†		10	5	-4821	-4821	-21
	SP-ST open on level RISE	10	5	3†		10	5	-4820	-4820	-20
	SP-DT one switch	4	2	1†		4	2	-4810	-4810	-10
	SP-DT two switches E.I.*	10	5	3†		10	5	-4815	-4815	-15
	DP-ST two switches E.I.* open on level FALL	10	5	3†		10	5	-4813	-4813	-13
	DP-ST two switches E.I.* open on level RISE	10	5	3†		10	5	-4814	-4814	-14
	DP-DT two SP-DT switches	4	2	1†		4	2	-4806	-4806	-06
CHART B snap action contacts	SP-DT one switch	12	5	3†		0.5**	0.25**	-7810	-7810	-10
	DP-DT two SP-DT switches	12	5	3†		0.5**	0.25**	-7806	-7806	-06
	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
	DP-DT Two SP-DT switches	2	2			0.4**	0.25**	-1006	-1006	-06
	SP-DT one switch	2	2			0.4**	0.25**	-1010	-1010	-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.

CHART C - MOUNTING STYLE

SERIES	MOUNTING STYLE	MINIMUM SPECIFIC GRAVITY	PRESSURE RATING @		FLANGE CLASS psi)	ORDER CODE
SERIES	MOUNTING STYLE	MINIMUM SPECIFIC GRAVITY	100°F 38°C	475°F 246°C	FLANGE CLASS psi)	ORDER CODE
221	1" NPT	0.6	600 psi 41 bar)	550 psi 38 bar)	--	C1-60
221	1" NPT	0.75	1000 psi 69 bar)	850 psi (59 bar)	--	C1-75
223 224	Flanged	0.6	275 psi (19 bar)	150 psi (10 bar)	150	C1-060
223 224	Flanged	0.6	600 psi (41 bar)	550 psi (38 bar)	300	C1-360
223 224	Flanged	0.6	600 psi (41 bar)	550 psi (38 bar)	600	C1-660
223 224	Flanged	0.75	275 psi (19 bar)	150 psi (10 bar)	150	C1-075
223 224	Flanged	0.75	720 psi (50 bar)	625 psi (43 bar)	300	C1-375
223 224	Flanged	0.75	1000 psi (69 bar)	850 psi (59 bar)	600	C1-675

Specifications

C1-60: Minimum specific gravity 0.60; Process pressure 600 psig (41 bar) at 100°F (38°C), 550 psig (38 bar) at 475°F (246°C).
C1-75: Minimum specific gravity 0.75; Process pressure 1000 psig (69 bar) at 100°F (38°C), 850 psig (59 bar) at 475°F (246°C).
Switch Type: Snap action or mercury switch.
Electrical Rating: See Model Chart.
Wiring Connections: G, WT or E enclosure, terminal block. EV enclosure, 18" (460 mm) leads.
Process Connections: 1" NPT standard (socket weld hubs or flanges optional). See Model Chart.
Enclosures: G, painted steel and aluminum. WT, painted steel, aluminum and neoprene. E, aluminum. EV, aluminum and neoprene.
Wetted Parts: Chamber, carbon steel. Trim 316SS, 303SS, 304SS and 430SS.
Weight: 221: 60 lb (27 kg); 223: 70 lb (32 kg); 224: 77 lb (35 kg).

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Series 221/223/224 Flanged Chamber Level Control

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