Adjustable Deadband 12" to 24", Pressure to 1000 psig (68.9 bar), Temperature to 475°F (246°C), Hermetically Sealed Switches

Adjustable deadband, flanged chamber and side mount are featured in the heavy duty reliable 225 series. A choice of four operating styles are offered: 1. Single stage adjustable deadband suitable for pump operation; 2. Two stage operation with adjustable lower stage, fixed upper stage for pump and high alarm; 3. Fixed lower stage and adjustable upper stage for pump and low alarm; 4. Fixed upper and lower stage for high and low alarm. Alarm stages can also be used for shutdown. Adjustable level changes are available in increments of 12", 24", 36", and 48".

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	225	1	G	4810	C1	0.75	L12	Series 225-1-G-4810-C1-75-L12 Liquid Level Control, general purpose enclosure, carbon steel body, SPDT, 0.75 specific gravity, 3" 125# cast iron flange, with adjustable level change.
SERIES	225 227 228							Liquid Level Control Liquid Level Control Liquid Level Control
CALIBRATION INSTRUCTIONS		1 2 3 4						Calibration Instructions 1 Calibration Instructions 2 Calibration Instructions 3 Calibration Instructions 4
ENCLOSURE			G WT E EV					General Purpose NEMA 1 Watertight NEMA-4, 4X Explosion-proof NEMA 7, 9 Explosion-proof/Vapor-proof NEMA 7, 9
CIRCUITS				48XX 78XX 78XXHM 98XX				See Chart A below See Chart B below See Chart B below See Chart B below
CHAMBER MATERIAL					C1 C216 HFC1			Carbon Steel Body 316 SST Body Heat Fins Carbon Steel Body
SPECIFIC GRAVITY						75 80 175 180 375 380 675 680		0.75 S.G. (225 ONLY) 0.80 S.G. (225 ONLY) 0.75 S.G. 150# Flange (227, 228 ONLY) 0.80 S.G. 150# Flange (227, 228 ONLY) 0.75 S.G. 300# Flange (227, 228 ONLY) 0.80 S.G. 300# Flange (227, 228 ONLY) 0.75 S.G. 600# Flange (227, 228 ONLY) 0.80 S.G. 600# Flange (227, 228 ONLY)
OPTIONS							H2 L12 L24 L48 R R1 R2 R3 STW 01 02 12 23720	H2 Socket Weld Hub (225, Steel Housing ONLY) Adjustable Level Change Adjustable Level Change Adjustable Level Change Manual Reset Sgl Stage Manual Reset Lower Stage 2-Stage Controls Manual Reset Upper Stage 2-Stage Controls Manual Reset Both Stages 2-Stage Controls SS Tag Wired Breather Only (E-Housing ONLY) Drain Only (E-Housing ONLY) Breather and Drain (E-Housing ONLY) 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		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 SPDT switch ◊	5	5				-7810HM	-7810HM	-10HM
	DP-DT Two hermetically sealed SPDT switches ◊	5	5				-7806HM	-7806HM	-06HM
	DP-DT two SPDT switches	10	3		10‡	3‡	-9806	-9806	-06
	SP-DT one switch	10	3		10‡	3‡	-9810	-9810	-10
	DP-DT Two SPDT 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. ◊ 30 VDC = 5 Resistive

CHART C - MOUNTING STYLE

SERIES	MOUNTING STYLE	MINIMUM SPECIFIC GRAVITY	PRESSURE RATING AT		FLANGE CLASS psi)	ORDER CODE
SERIES	MOUNTING STYLE	MINIMUM SPECIFIC GRAVITY	100°F 38°C	475°F 246°C	FLANGE CLASS psi)	ORDER CODE
225	1" NPT	0.75	600 psi (41 bar)	550 psi (34 bar)	--	C1-75
225	1" NPT	0.80	1000 psi (69 bar)	750 psi (52 bar)	--	C1-80
227 228	Flanged	0.75	275 psi (19 bar)	100 psi (7 bar)	150	C1-175
227 228	Flanged	0.80	275 psi (19 bar)	100 psi (7 bar)	150	C1-180
227 228	Flanged	0.75	600 psi (41 bar)	425 psi (29 bar)	300	C1-375
227 228	Flanged	0.80	720 psi (50 bar)	425 psi (29 bar)	300	C1-380
227 228	Flanged	0.75	600 psi (41 bar)	500 psi (34 bar)	600	C1-675
227 228	Flanged	0.80	1000 psi (69 bar)	750 psi (52 bar)	600	C1-680

Specifications

Minimum Specific Gravity: 0.75.
Switch Type: Snap action or mercury. See charts A and B.
Electrical Ratings: See charts A and B.
Wiring Connections: > G, WT or E enclosure, terminal block;: EV enclosure, 18" (460 mm) leads.
Process Connections: 1" NPT standard (1" socket weld hubs or flanges optional).
Enclosure Rating: See model chart.
Enclosure: > G, painted steel and aluminum;: WT, painted steel, aluminum, neoprene;
E, aluminum. EV, aluminum and neoprene.
Wetted Parts: C1 construction. Chamber, carbon steel. Float and trim 303SS, 304SS, 430SS.
Weight: 225, 50 lb (22.7 kg); 227, 60 lb (27 kg); 228, 67 lb (30.4 kg).
Agency Approvals: UL.
: Suggested Specifications
Liquid level control shall be 225 (227) (228) Series with adjustable deadband of (12") (24") (36") (48"). Unit shall be external side mount type. Process connections shall be 1" NPT (socket weld hub) (flanged). Suitable for operation at 1000 psig (68.9 bar) at 100°F (38°C); 850 psig (21 bar) at 475°F (246°C) with a minimum specific gravity of 0.75. Switch mechanism shall be gravity return and shall be activated by a stainless steel float.

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Series 225/227/228 Flanged Chamber

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