CENTRAC™ Series Metering Pumps

CENTRAC pumps combine a unique constant stroke length drive mechanism and electronic variable speed drive technology. The unique drive system provides a steady state accuracy of +/- 0.5% over the entire turndown range. This is twice the accuracy of the standard +/- 1% of most metering pumps. Greater accuracy means better control of the treatment process and more efficient chemical usage.

Material (liquid end): 316SS / PVDF / PVC / PP / Acrylic
Pressure max: 3,675 psi / 253 bar (metallic or plastic liquid end)
Flow max: 1,430 gph / 5,413 lph (metallic or plastic liquid end)
Flow variation control: Manual / Remote
Certifications: ETL
0.5% Steady State Accuracy over 100:1 turndown

Pressure Max - Metallic Liquid End

253

Bar

Pressure Max - Plastic Liquid End

253

Bar

Flow Max - Metallic Liquid End

5413

LPH

Flow Max - Plastic Liquid End

5413

LPH

Drive

Helical Gear and Scotch Yoke (all moving parts submerged in oil)

Liquid End

High Performance Diaphragm (hydraulically balanced). Multiplexing - Simplex or Duplex

Maximum Performance Ratings (per head)

1430 GPM @ 84 PSIG to 4.1 GPM @ 3675 PSIG

Capacity Control

(AC) Electronic Variable Frequency with 100:1 Turndown

(DC) Electronic Servo Speed Drive with 100:1 Turndown

Maximum Stroking Speed

162 SPM

Accuracy

0.5% Steady State Accuracy Over 100:1 Turndown

Alternative AC Vector Duty Motor Sizing for 100:1 turndown

Plunger Diameter (INCH)	No. of Heads.	Max. Capacity Plastic LE (GPH) @ 150 psig	Max. Capacity Metallic LE (GPH) @ 200 psig	AC Vector Duty Motor Types Sizes (Torques) & Pressure Limits in PSIG
Plunger Diameter (INCH)	No. of Heads.	Max. Capacity Plastic LE (GPH) @ 150 psig	Max. Capacity Metallic LE (GPH) @ 200 psig	1.0 HP (3.0 LBS-FT)	1.5 HP 4.5 LBS-FT)	2 HP (6.0 LBS-FT)	3 HP (9.0 LBS-FT)	5 HP (15.0 LBS-FT)
3/8” (9.5 mm)	Simplex	5.5	4.1	2404	3607	3675	----	----
3/8” (9.5 mm)	Duplex	11.0	8.2	1924	2885	3675	----	----
7/16” (11 mm)	Simplex	7.7	7.0	1767	2650	3533	3675	----
7/16” (11 mm)	Duplex	15.4	14.7	1413	2120	2826	3675	----
9/16” (14 mm)	Simplex	12.9	12.6	1069	1603	2137	3206	3675
9/16” (14 mm)	Duplex	25.8	25.2	855	1282	1710	2535	3675
5/8” (16 mm)	Simplex	16.1	17.5	866	1298	1731	2597	3675
5/8” (16 mm)	Duplex	32.2	35.0	692	1039	1385	2077	3439
¾” (20 mm)	Simplex	24.3	24	601	902	1202	1803	2986
¾” (20 mm)	Duplex	48.6	48	481	721	1245	1443	2388
1” (25 mm)	Simplex	45	45	338	507	676	1014	1679
1” (25 mm)	Duplex	90	90	270	406	541	811	1343
1-1/4” (32 mm)	Simplex	70	70	216	325	433	649	1075
1-1/4” (32 mm)	Duplex	140	140	173	260	346	519	860
1-1/2” (38 mm)	Simplex	100	100	150	225	301	451	746
1-1/2” (38 mm)	Duplex	200	200	120	180	240	361	597
2” (51 mm)	Simplex	180	180	85	127	169	254	420
2” (51 mm)	Duplex	360	360	68	101	135	203	336
2-1/2” (64 mm)	Simplex	280	280	54	81	108	162	269
2-1/2” (64 mm)	Duplex	560	560	43	65	87	130	215
3-1/2” (89 mm)	Simplex	550	550	XXXX	41	55	83	137
3-1/2” (89 mm)	Duplex	1100	1100	XXXX	XXXX	44	66	110
4” (102 mm)	Simplex	715	715	XXXX	XXXX	42	63	105
4” (102 mm)	Duplex	1430	1430	XXXX	XXXX	XXXX	51	84

*Maximum liquid end pressure for Centrac B pumps is 4,000 psig at this time

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Pump Dimensions

Dimensions shown are approximate for TENV and are not for construction. Consult Milton Roy for exact engineering dimensions.

Plgr. Dia.	A	B	C	D
Metallic
3/8 - 1"	5 7/32"	5 7/32"	7"	1/2"
1 1/4"	5 7/32"	5 7/32"	7"	1/2"
1 1/2"	7 1/16"	7 9/16"	8 1/4"	1"
2"	7 9/16"	7 9/16"	8 1/4"	1"
2 1/2"	7 9/16"	7 9/16"	8 1/4"	1"
3 1/2"	10 1/8"	13"	1 1/2"	1 1/2"
Plastic
3/8 - 1"	6 1/2"	6 1/2"	6 15/16"	1/2"
1 1/4"	6 1/2"	6 1/2"	6 15/16"	1/2"
1 1/2"	9 9/16"	9 9/16"	8 3/4"	1"
2"	9 9/16"	9 9/16"	8 3/4"	1"
2 1/2"	9 9/16"	9 9/16"	8 3/4"	1"
3 1/2"	15 7/8"	13 1/8"	13 1/4"	1 1/2"

Centrac B Pump low flow model shown with special Centrac S anchor bolt base

High Accuracy Metering Pump | CENTRAC™ B Series

Key Specifications

Pressure Max - Metallic Liquid End

Pressure Max - Plastic Liquid End

Flow Max - Metallic Liquid End

Flow Max - Plastic Liquid End

Why this product?

Drive

Liquid End

Maximum Performance Ratings (per head)

Capacity Control

Maximum Stroking Speed

Accuracy

Performance Specifications

Alternative AC Vector Duty Motor Sizing for 100:1 turndown

Connect With Our Experts

Dimensions

Pump Dimensions

Applications

Municipal drinking/wastewater plants

Industrial water treatment

Chemistry/Petrochemistry

Refinery/Downstream

Oil & Gas

Food and beverage industry

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