Product Overview

Traditional self-priming pumps commonly suffer from mechanical seal damage/leakage, cumbersome priming with foot valves, dry-run burnout risks, and short lifespan in high-corrosion conditions, significantly compromising continuous operational reliability & O&M costs in petrochemical/power/environmental harsh applications.

This series resolves these challenges with seal-free multi-face centrifugal dynamic sealing + electric air control valve permanent self-priming system + triple protection (temp/pressure/wear resistance), completely eliminating leakage risks & priming dependency for “first prime, permanent self-priming”, zero-maintenance, low-noise, high-efficiency safe & reliable operation.

Precisely deployed for petrochemical acid/alkali transport, power desulfurization slurry, environmental sewage/sludge, pharmaceutical/food clean fluids, and mining high-concentration solid-liquid transport across 15+ industries, supporting wide-range conditions: flow 5.6–1600 m³/h, head 10–125 m, self-priming height 4–6 m, media temperature ≤120℃ (custom). Achieving 50%+ O&M cost reduction, zero-leakage compliance, and high reliability, setting a new industry benchmark for seal-free automatic self-priming pumps.

Product Advantages

Extended Service Life: Seal-free dynamic sealing + wear-resistant alloys. Lifespan ≥15y—10× longer than mechanical seal pumps.

Significant Energy Savings: Zero-friction seal-free design + optimized hydraulics. Efficiency ≥78%, energy consumption ↓20–30% with permanent self-priming.

Lower Maintenance Costs: Permanent self-priming eliminates foot valve/priming/seal replacement. Inspection in 1h, labor costs ↓50%+.

Lightweight & Compact Design: Seal-free structure eliminates heavy seal chamber. Weight ↓~22%, reducing installation & lifting costs.

Faster Installation: Pre-aligned base + quick-connect flanges enable zero-cutting installation. Commissioning ready in 1.5h, cycle ↓45%.

Application Scenarios

Petrochemical: Acid/alkali/solvent/oil transport. Seal-free, zero-leakage, corrosion/wear resistant.

Power & Metallurgy: Desulfurization slurry/cooling water/coking wastewater. Permanent self-priming prevents dry-run.

Environmental & Municipal: Sewage/sludge/fire drainage. Auto self-priming + non-clogging impeller for emergency response.

Pharmaceutical & Food: Pharma liquids/beverages/pure water. 304/316L optional, GMP compliant.

Mining: High-concentration slurry/tailings/mud. Wear-resistant alloy + large-particle passage.

Media: Clean water/acids/alkalis/solvents/slurry. Temp: ≤50℃ (std) / ≤120℃ (custom). No long fibers.

Technical Parameters

Model Designation

Product Structure Diagram

	NO	Component
	1	Motor
	2	Discharge Check Valve
	3	Casing Cover
	4	Diffuser
	5	Impeller
	6	Casing
	7	Air Vent
	8	Auxiliary Impeller
	9	Overflow Pipe
	10	Solenoid Valve
	11	Shaft

Performance Data Table 1

Pump Model	Speed n(r/min)	Flow Rate  Q(m³/h)	HeadH(m)	Motor Power (kW)	Max. Suction Lift (m)	Inlet Size (mm)	Outlet Size (mm)	Weight (kg)
50WFB11.2-10	2960	6.7	10.9	1.5	5	50	40	102
		11.2	10
		13.4	9.3
50WFB12.5-12.5	2960	7.5	13.6	2.2	5	50	40	110
		12.5	12.5
		15	11.6
50WFB11.2-16	2960	6.7	17.6	2.2	5	50	40	113
		11.2	16
		13.4	14.8
50WFB12.5-20	2960	7.5	22	3	5	50	40	115
		12.5	20
		15	18.5
50WFB11.2-25	2960	6.7	27.4	4	5	50	40	147
		11.2	25
		13.4	23.7
50WFB12.5-32	2960	7.5	34.3	5.5	5	50	40	200
		12.5	32
		15	29.6
50WFB11.2-40	2960	6.7	42	7.5	5	50	40	177
		11.2	40
		13.4	38.4
50WFB12.5-50	2960	7.5	52.5	11	5	50	40	230
		12.5	50
		15	48
50WFB12.5-64	2960	7.5	66	15	4	50	40	360
		12.5	64
		15	62
65WFB22.5-10	2960	13.5	11.3	2.2	5	65	50	130
		22.5	10
		27	9
65WFB25-12.5	2960	15	14.1	3	5	65	50	130
		25	12.5
		30	11.3
65WFB22.5-16	2960	13.5	17.4	4	5	65	50	165
		22.5	16
		27	14.8
65WFB25-20	2960	15	21.8	5.5	5	65	50	185
		25	20
		30	18.5
65WFB22.5-25	2960	13.5	28	5.5	5	65	50	203
		22.5	25
		27	24
65WFB25-32	2960	15	35	7.5	5	65	50	222
		25	32
		30	30
65WFB22.5-40	2960	13.5	42.4	11	5	65	50	314
		22.5	40
		27	37.6
65WFB25-50	2960	15	53	15	5	65	50	322
		25	50
		30	47

Performance Data Table 2

Pump Model	Speed n(r/min)	Flow Rate  Q(m³/h)	HeadH(m)	Motor Power (kW)	Max. Suction Lift (m)	Inlet Size (mm)	Outlet Size (mm)	Weight (kg)
100WFB90-25	2960	54	28.8	18.5	5	100	80	300
		90	25
		108	22.4
100WFB100-32	2960	60	36	22	5	100	80	331
		100	32
		120	28
100WFB90-40	2960	54	43.2	30	5	100	80	560
		90	40
		108	37.6
100WFB100-50	2960	60	54	37	5	100	80	567
		100	50
		120	47
100WFB90-64	2960	54	69.6	55	5	100	80	710
		90	64
		108	59.6
100WFB100-80	2960	60	87	75	5	100	80	786
		100	80
		120	74.5
100WFB90-100	2960	54	106.4	75	4	100	80	890
		90	100
		108	94.4
125 WFB150-16	2960	90	18	18.5	5	125	100	417
		150	16
		180	13.5
125WFB135-20	2960	80	24	22	5	125	100	555
		135	20
		160	16.5
125 WFB150-25	2960	80	30	30	5	125	100	570
		150	25
		180	20.6
125 WFB135-32	2960	80	36	30	5	125	100	570
		135	32
		160	28
125WFB150-40	2960	90	45	45	5	125	100	646
		150	40
		180	35
125 WFB135-50	2960	80	54	55	5	125	100	868
		135	50
		160	47
125 WFB150-64	2960	90	69	75	5	125	100	930
		150	64
		180	60
105WFB180-10	1480	108	12	15	6	150	125	465
		180	10
		216	8.2
150WFB200-12.5	1480	120	15	18.5	6	150	125	550
		200	12.5
		240	10.3

Performance Data Table 3

Pump Model	Speed n(r/min)	Flow Rate  Q(m³/h)	HeadH(m)	Motor Power (kW)	Max. Suction Lift (m)	Inlet Size (mm)	Outlet Size (mm)	Weight (kg)
200 WFB270-50	1480	162	57	110	6	200	150	1650
		270	50
		324	47.8
200 WFB300-64	1480	180	70.4	132	6	200	150	1800
		300	64
		360	59
200 VFB400-12.5	1480	240	14.1	30	6	200	150	749
		400	12.5
		460	10.5
200 WFB360-16	1480	216	17.2	37	6	200	150	1000
		360	16
		414	14
200 WFB400-20	1480	240	21.5	55	6	200	150	1087
		400	20
		460	17.5
200 WFB360-25	1480	216	29.6	55	6	200	150	1200
		360	25
		414	22.8
200 WFB400-32	1480	240	37	90	6	200	150	1360
		400	32
		460	28.5
200 WFB360-40	1480	216	44	90	6	200	150	1340
		360	40
		414	36
200 WFB400-50	1480	240	55	132	6	200	150	1576
		400	50
		460	45
200 WFB360-64	1480	216	70.4	160	6	200	150	1900
		360	64
		414	59
200 WFB400-80	1480	240	88	200	6	200	150	2100
		400	80
		460	74
250 WFB550-16	1480	330	18	45	6	250	200	1100
		550	16
		630	13.4
250 WFB500-20	1480	300	22	55	6	250	200	1150
		500	20
		570	17.8
250 WFB550-25	1480	330	27.1	75	6	250	200	1200
		550	25
		630	22
250 WFB500-32	1480	300	37.3	90	6	250	200	1400
		500	32
		570	28.5

Performance Data Table  4

Pump Model	Speed n(r/min)	Flow Rate  Q(m³/h)	HeadH(m)	Motor Power (kW)	Max. Suction Lift (m)	Inlet Size (mm)	Outlet Size (mm)	Weight (kg)
350WFB860-44	1480	602	46.6	200	6	350	300	3120
		860	44
		1032	38
350WFB960-50	1480	672	53	280	6	350	300	3250
		960	50
		1152	44
400WFB1400-20	980	1010	25	160	6	400	350	3600
		1400	20
		1600	15
400WFB1600-22.5	980	1200	26	200	6	400	350	3800
		1600	22.5
		1800	15
Note: Performance data based on standard conditions (1 atm, clean water @ 20℃). Correct for non-standard conditions per Operation Manual. Self-priming height: vertical elevation from static liquid surface to pump suction centerline.

Operating Conditions

Performance Limits • Flow range: 5.6–1600 m³/h (93–26,680 GPM) • Head range: 10–125 m (33–410 ft) • Self-priming height: 4–6 m (13–20 ft, at ambient pressure) • Speed: 2960/1480 rpm (dual-speed optional)

Temperature Limits • Media temperature: ≤50℃ (≤122℉, standard) / ≤120℃ (≤248℉, high-temp custom) • Ambient temperature: ≤40℃ (≤104℉)

Media Requirements • Media type: Clean water / Acids/alkalis / Solvents / Slurry / Sludge • Solid content: General suspended solids, no long fibers

Installation Limits • Inlet/outlet diameter: DN50–DN400 (flange standard GB/T 17241.6) • Installation: Horizontal base (vertical/explosion-proof customizable)

Note: For special conditions (high viscosity/strong corrosion/high altitude/explosion-proof), please consult before selection. Custom solutions available – Please contact us.

Compliance & Certifications

National Standard Compliance: Strictly manufactured per GB/T 5657-2013 & JB/T 4126-2013 “Self-priming pumps”. Hydraulic performance & mechanical safety 100% compliant. Third-party full performance curve test reports available.

Zero-Leakage Environmental Certification: Seal-free dynamic sealing structure passes petrochemical industry zero-leakage acceptance standards, eliminating “run-drip-leak”, compliant with GB 31570-2015 petroleum chemical industry pollutant emission standards.

International Quality System: ISO 9001:2015 certified. Core pressure-bearing components evaluated per CE/PED 2014/68/EU, meeting EU/US market entry requirements.

Factory Inspection Standard: Every unit undergoes 1.5× rated pressure hydrostatic test (5-min hold) + self-priming performance test (4–6 m height/≤3 min priming) + vibration/noise test (≤70 dB(A)), guaranteeing zero-leakage, low-noise delivery.

OEM & CUSTOM

Fast Standard Delivery: Covers flow 5.6–1600 m³/h, head 10–125 m. Standard cast iron/304 stainless steel + multi-face dynamic sealing. Technical confirmation & sample prototyping within 72 hours.

Deep Customization Capabilities:

Material Upgrade: Wetted parts optional in 316/duplex 2205 stainless steel/wear-resistant alloy/PTFE-lined for strong acids/alkalis, high-chloride, or high-wear conditions.

Seals & Motors: Optional high-temp dynamic sealing (up to 120℃), explosion-proof motors (Ex d IIB T4), IE4 ultra-efficiency or VFD-dedicated drives.

Structural Adaptation: Vertical/horizontal layout switching, flange standard switching (GB/ANSI/DIN), explosion-proof configuration/outdoor rain-proof canopy customization.

Intelligent Expansion: Pre-wired interfaces for level/pressure/dry-run sensors; supports integration with PLC automation, IoT remote monitoring, multi-pump rotation modules.

Please contact us for customization inquiries. Our engineering team delivers process proposals within 48 hours.

Installation Guidelines

Installation Key Points:

1.Mount pump horizontally on solid base. Tighten anchor bolts symmetrically. Ensure shaft horizontal deviation ≤0.05 mm/m to prevent excessive vibration from uneven loading.

2.Connect inlet/outlet with flexible rubber joints. Never transmit pipe stress to pump body. Provide independent supports for inlet/outlet piping.

3.Before first use, inject priming water (~1/3 pump chamber volume), open electric air control valve, confirm no pipeline leakage.

4.Jog test to verify motor rotation (clockwise from motor end). Confirm insulation resistance ≥50 MΩ before operation. Observe self-priming completes within ≤3 minutes.

Commissioning Process: Prime injection → Jog test for direction → Start self-priming → After reaching rated duty, record current/pressure/vibration/noise data → Acceptance sign-off.

Request the “WFB Series Seal-Free Automatic Self-Priming Pump Installation & Maintenance Manual” (PDF/English version) for complete dimensional drawings, piping diagrams, and commissioning logs.

FAQs

Q1: How does seal-free dynamic sealing achieve “zero leakage”?

Multi-face centrifugal dynamic sealing uses centrifugal force to form a dynamic liquid seal barrier with zero mechanical contact friction, completely eliminating “run-drip-leak”, extending lifespan 10×+ vs. mechanical seals.

Q2: How does permanent self-priming achieve “maintenance-free after first prime”?

Electric air control valve + vacuum pump principle integration auto-cuts siphon after first prime. Subsequent startups require no priming, achieving permanent self-priming with zero maintenance.

Q3: How to ensure stable priming at 4–6 m self-priming height?

Optimized pump chamber volume + precision gas-liquid separation structure, combined with electric air control valve for rapid air exhaust. Tested: 4–6 m self-priming height completes priming within ≤3 minutes under ambient pressure conditions.

Q4: How to protect wetted parts against high-wear media (e.g., slurry)?

Standard wear-resistant alloy wetted parts (hardness ≥HRC58), optional ceramic coating/SiC lining. Tested: wear rate reduced by 60%+ in high-concentration slurry conditions.

Q5: What customizations are needed for high-temperature variant (≤120℃)?

Standard suits ≤50℃. For >50℃: ① High-temp dynamic sealing (special alloy + SiC); ② Pump body insulation jacket; ③ Enhanced motor cooling + high-temp bearings.

Fill out my Wufoo form!