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WQR High Temperature Submersible Sewage Pump | Max. 95℃

Engineered with H-class motor insulation, dual FKM seals, and high-temp turbine oil. Designed to handle aggressive industrial wastewater, boiler blowdown, and thermal springs without thermal degradation.

Max Liquid Temp: 95°C Continuous
Motor Insulation: Class H (180°C Limit)
Protection Class: IP68 (Up to 10m Depth)
Sealing Tech: Dual FKM / Viton® + SiC Mechanical Seal
Power Range: 0.75 kW – 1.5kW (380V/50Hz S1)
Testing Standard: GB/T 3216-2016 Grade 3B / CE Marked

Quantity:
Insulation Class:	F(155) H (180)
Availability:





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Model:
WQR
Brand:
TQPUMPS

Product Features

Technical Specification

FAQ

Core Engineering Features

1. Class H Thermal-Resistant Motor:

Built with 180°C-rated Class H copper windings and IP68 submersible protection. Designed for continuous S1 duty in hot liquid environments up to 95°C. Optional thermal protector trips at 150°C for complete motor safety.

2. Dual High-Temperature Sealing System:

Combines a Silicon Carbide mechanical seal (resistant to 120°C+) for dynamic sealing with FKM (Viton®) lip seals and O-rings for static sealing, effectively isolating the motor from harsh thermal fluids.

3. Specialized Turbine Oil Lubrication:

The oil chamber is pre-filled with high-grade ISO VG20 / VG32 turbine oil. Unlike standard lubricants, it does not emulsify under extreme heat, maintaining optimal cooling and lubrication for mechanical seals.

4. Heavy-Duty Bearings & Anti-Corrosion Coating:

Equipped with high-precision NSK bearings and high-temperature grease for extended operation (>10,000 hours). All cast iron parts undergo cathodic electrophoretic coating (80±5µm) to prevent chemical corrosion.

WHY WQR? (WQR vs Standard WQ )

Standard submersible pumps fail rapidly in high-temperature liquids due to motor winding burnout, rubber seal melting, and bearing grease degradation.

The table below highlights the engineering upgrades in the WQR series:

Component / Feature	Standard WQ Series (≤40°C)	WQR High-Temp Series (≤95°C)	Engineering Benefit
Motor Insulation	Class F (155°C limit)	Class H (180°C limit)	Prevents thermal aging & motor burnout
Mechanical Seal	Standard NBR Rubber	Silicon Carbide + FKM	High thermal resistance & dynamic tightness
Static Seals / O-Rings	Standard NBR Rubber	Fluororubber (FKM)	Superior heat & chemical resistance
Lubrication Oil	Standard Mineral Oil	Turbine Oil (ISO VG20 / VG32)	No emulsification; continuous cooling
Bearings & Grease	Standard Grease	NSK Bearings + High-Temp Grease	+50% resistance to heat deformation
Cable Jacket	Standard Rubber	Heavy-Duty H07RN8-F Neoprene	Prevents cable hardening and cracking
Surface Protection	Standard Paint	Cathodic Electrophoresis (80±5µm)	>1,000 hrs Salt Spray Test corrosion resistance

Industrial Applications

• Boiler Blowdown & Steam Condensate: Draining hot wastewater and condensate sumps in industrial boiler houses.

• Industrial Heat Recovery: Circulating and discharging thermal fluids in textile, dyeing, paper, and food processing plants.

• Power Plants & Metallurgy: Pumping high-temperature slag water and cooling tower wastewater in steel mills and power stations.

• Geothermal & Thermal Springs: Hot spring water extraction and drainage in geothermal and volcanic mining zones.

• Commercial Laundries & Saunas: Effluent management for commercial laundries, public baths, saunas, and commercial kitchens.

Parameter	Value
Maximum Flow Rate	100m³/h
Voltage	220 V / 380 V
Maximum Head Rate	45m
Frequency	50 Hz (60 Hz on request)
Speed	2950 RPM
Maximum Motor Power	7.5KW
Structure	Vertical
Discharge Port Size	DN50-DN80
Efficiency Class	IE3
Seal Type	Double-end mechanical seal + oil seal / oil chamber
Insulation Class	H
Working Pressure	Up to PN6
Protection Rating	IP68
Cooling Method	Water Cooling
Packaging	Wooden Case
Origin	Shanghai, China

Model Meaning

Example: 50WQR10-10-0.75QG = DN50 submersible sewage pump, 10 m³/h, 10 m head, 0.75 kW, cutting type.

Code	Meaning
50	Discharge diameter (mm)
WQR	High Temperature Submersible Sewage Pump
10 (first number)	Rated flow (m³/h)
10 (second number)	Rated head (m)
0.75	Rated power (kW)

Hydraulic Performance

Model	Flow Q(m³/h)	Head H(m)	Power (kW)	Current(380V)	Speed(RPM)	Discharge	Weight(kg)
50WQ12-12-0.75J	12	12	0.75	1.83 A	2830	DN50 PN6	26
50WQ20-10-1.1	20	10	1.1	1.83 A	2830	DN50 PN6	27
50WQ21-13-1.5	21	13	1.5	2.58 A	2840	DN50 PN6	29

Structure Diagram

50WQ20-10-1.1 剖面图-英文_01(1)

FAQs

Q1: What is the benefit of Class H motor insulation over Class F?

Class F insulation is rated for 155°C, while Class H is rated for 180°C. In high-temperature water (>60°C), Class H insulation prevents rapid insulation degradation and short circuits.
Q2: Why are only three models? Can you make bigger flow and head

Yes. We can do it up tp 7.5kW. Please send us your request and we can customize
Q3: What cable comes standard with the pump?

The pump comes standard with 10 meters of heavy-duty H07RN8-F rubber cable. PTFE jacketed cables are available for acidic or extra high-temperature environments.
Q4: Can I get a single-phase version?

Nope. So far only three phrase available
Q6: What is the warranty?

18 months from the date of shipment or 12 months from installation, whichever comes earlier. (Mechanical seal not included)