Sigma/ 3 Diaphragm Metering Pump

Together with Sigma/ 1 and Sigma/ 2, Sigma/ 3 Motor Diaphragm Metering Pumps compose a continuous product line, covering the capacity ranges from 4.5 to 272 gph (17 - 1,030 L/h) at uniform operation conception, control conception and spare parts management. All three pumps are available as Basic types with no internal electronic control systems or as microprocessor versions for rapid and reliable adjustment to fluctuating metering tasks.

Advantages

Process safety: In case of average, metering medium does not escape to the environment or into the pump gear, thanks to double diaphragm with diaphragm failure indication.
Reliable operation thanks to automatic bleeding.
Protection of the pump against overload with integrated relief valve.
High process quality: reproducible metering accuracy better than ±2 %
Easy handling: direct adjustment and control of metering capacity in plain language via the big illuminated LC display (Control Version)
Problem-free connection to complex process control systems with optional equipment with PROFIBUS®-DP interface (Control Version)
Simplified spare parts management and decreased stock handling efforts at same availability of pumps within the Sigma product line.
Less training efforts for operating staff when handling the Sigma product line, thanks to same operation modus

Application Areas

Quantity-proportional chemical addition in water treatment, e.g. Sodium Hypochlorite for drinking water disinfection.
Measurement-dependent chemical addition, e.g. acid and brine metering for pH neutralization in waste water treatment
Pulse-controlled metering when bottling different fluids.

Features

Capacity range 38 - 272 gph (145 - 1.030 L/h), 174 - 58 psig (12 - 4 bar)
High-strength inner housing for energy-stressed components as well as additional polymer housing as protection against corrosion.
Stroke length: 0.24" (6 mm), adjustable via self-arresting adjusting knob in 0.5 % steps.
Double diaphragm with diaphragm failure indication (optional, also retrofittable), i.e. even with diaphragm failure the fluid may not escape uncontrollably from the pump or get into the gear area of the pump.
Liquid end materials: PVDF, stainless steel
Reproducible metering accuracy at defined conditions and correct installation better than ±2 % (stroke length area 30 - 100 %).

Features Basic type (S3Ba)

Selection of drive versions: three-phase normal motor, single-phase alternating current motor, motors for the use in EXe and EXde areas, various flange versions for the use of customer-specific motors.
Protection class IP 55 (optionally ATEX-T3/T4)
Stroke-length adjustment: manually (optional with stroke positioning drive or with stroke control drive)

Features Control Version (S3Ca)

Microprocessor control: optimum combination of variable AC frequency combined with digital stroking frequency, ensures exact metering even in the lower minimum range due to individual stroke control.
The individual pump functions are simply adjusted using the five programming keys.
Big backlit LC Display
Indication in plain language of metering capacity in US-gal/h or L/h
3-LED-function as operation indicator, alarm indicator and fault indicator
Control via contact or analog signals (e.g. 0/4-20 mA)
On demand, integration of 2-week-process timer. The intelligent alternative to clock timers.
Protection class IP 65
Interface for PROFIBUS®-DP

Technical Data

	at 50					at 60 Hz
Pump type S3Ba / S3Ca	psig	bar	gph	L/h	strokes/ min.	psig	bar	gph	L/h	strokes/ min.	suction lift mWS	connector dimen-sions G-DN
120145 PVT	145	10	38	145	72	145	10	46	174	86	5	1½-25
120145 SST	174	12	38	145	72	174	12	46	174	86	5	1½-25
120190 PVT	145	10	50	190	103	145	10	60.2	228	124	5	1½-25
120190 SST	174	12	50	190	103	174	12	60.2	228	124	5	1½-25
120270 PVT	145	10	71	270	144	145	10	85.6	324	173	5	1½-25
120270 SST	174	12	71	270	144	174	12	85.6	324	173	5	1½-25
120330 PVT *	145	10	87	330	180	145	10	-	-	-	5	1½-25
120330 SST *	174	12	87	330	180	174	12	-	-	-	5	1½-25
070410PVT	100	7	108	410	72	100	7	130	492	86	4	2-32
070410 SST	100	7	108	410	72	100	7	130	492	86	4	2-32
070580 PVT	100	7	153	580	103	100	7	183.9	696	124	4	2-32
070580 SST	100	7	153	580	103	100	7	183.9	696	124	4	2-32
040830 PVT	58	4	219	830	144	58	4	264	1,000	173	3	2-32
040830 SST	58	4	219	830	144	58	4	264	1,000	173	3	2-32
041030 PVT *	58	4	272	1,030	180	58	4	-	-	-	3	2-32
041030 SST *	58	4	272	1,030	180	58	4	-	-	-	3	2-32

* Only available for S3Ba.
For S3Ca Pump types please see 60 Hz-capacity data.

Materials in Contact with Chemicals at Liquid End Version

Material	Liquid End	Suction/Discharge Connector	Seals	Balls (DN 25)	Panel/ Spring (DN 32)	Integrated Pressure Relief Valve
PVT	PVDF (Polyvinylidene- fluoride)	PVDF (Polyvinylidene- fluorid)	PTFE	Glass	Ceramic/ Hast.C + CTFE	PVDF/FPM*
SST	Stainless Steel	Stainless Steel	PTFE	Stainless Steel	Ceramic / Hast.C	Stainless Steel/FPM*