Product Definition: The ISW Series Horizontal Centrifugal Pump is a single-stage single-suction centrifugal pump designed per ISO 2858 standard, featuring a direct-coupled structure and optimized hydraulic model, supporting modular selection (10 sub-models) for transfer of water, hot water, corrosive, and flammable liquids.
Pain Points Addressed: Resolves operational challenges of conventional horizontal pumps including suboptimal energy efficiency under variable media conditions, excessive running noise, system pressure fluctuation, and installation constraints in space-limited layouts.
Application Scenarios: Suitable for municipal water supply/drainage, high-rise secondary boosting, HVAC circulation, chemical anti-corrosion, and explosion-proof zones requiring stable pressure control (≤1.6MPa), low noise operation (≤55dB(A)), and multi-media compatibility.
Extended Service Life: Standard SiC mechanical seals + 304 stainless steel shaft sleeves resist wear & corrosion. Design lifespan ≥12 years—over 40% longer than standard cast-iron horizontal pumps.
Significant Energy Savings: CFD-optimized hydraulic model + high-precision cast impellers achieve ≥82% efficiency at rated duty. Combined with VFD regulation, annual electricity costs drop by 25%–35%.
Lower Maintenance Costs: Direct-coupled structure + back-pull-out bearing assembly enables seal/bearing replacement without disconnecting piping. Single maintenance ≤1 hour, cutting labor costs by 55%.
Lightweight & Compact Design: Motor-pump coaxial direct connection eliminates coupling & baseplate. Overall weight reduced by ~20% for equivalent power ratings, lowering floor load & space requirements.
Faster Installation: Standardized inlet/outlet flanges + pre-aligned design require no secondary calibration. Standard units reach commissioning readiness within 1.5 hours from unboxing, compressing installation cycle by 50%.
ISW (Clean Water): Industrial/municipal water supply, high-rise boosting, marine systems, garden irrigation, fire boosting, long-distance transport, HVAC cooling/heating circulation, bathroom hot/cold water loops. Media temperature ≤85℃/185℉.
ISWR (Hot Water): Hot water circulation for energy/metallurgy/chemical/textile/paper industries; boiler/hotel heating loops. Operating temperature ≤120℃/248℉.
ISWH (Corrosion-Resistant): Transport of corrosive liquids (acid/alkali/salt solutions) for petroleum/chemical/metallurgy/power/food/pharmaceutical sectors. Temperature range: -20℃ to 105℃ (-4℉ to 221℉).
ISWY/ISWHY (Explosion-Proof): Flammable/explosive liquids (gasoline/alcohol/solvents) for petroleum/light-industry/chemical/mechanical sectors. 304/316 stainless steel + Ex-certified motors.
ISWD (Low-Noise): Noise-sensitive environments (hospitals/hotels/offices). Chilled/cooling water circulation & terminal boosting for HVAC systems. Operating noise ≤55 dB(A).
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| 1 | Base Plate | 4 | Impeller | 7 | Water Deflector Ring | 10 | Shaft |
| 2 | Drain Port | 5 | Pressure Tap | 8 | End Cover | / | / |
| 3 | Pump Casing | 6 | Mechanical Seal | 9 | Motor | / | / |
International Standard Compliance: Strictly manufactured per ISO 2858 “End-suction centrifugal pump performance standards”. Hydraulic performance & mechanical safety 100% compliant. Full performance curve test reports from third parties available.
Quality System Certification: ISO 9001:2015 certified. Core pressure-bearing components evaluated per CE/PED 2014/68/EU, meeting EU/US market entry requirements.
Explosion-Proof & Safety Certification: Explosion-proof models (ISWY/ISWHY) feature Ex d IIB T4 certified motors, compliant with GB 3836.1/IEC 60079 standards for flammable/explosive environments.
Environmental & Material Certification: Wetted parts comply with RoHS/REACH directives. Stainless steel materials supplied with GB/T 3280/ASTM A240 certificates, ensuring zero heavy metal leaching risk.
Factory Inspection Standard: Every unit undergoes 1.5× rated pressure hydrostatic test (5-min hold) + G6.3 dynamic balance calibration + noise testing, guaranteeing zero-vibration, zero-leakage, low-noise delivery.
Rapid Delivery for Standard Models: Covers flow rates of 3–400 m³/h and heads of 8–150 m. Standard configuration includes IP55-rated, Class F insulated motors. Technical validation and sample prototyping are completed within 72 hours.
Advanced Customization Capabilities: • Material Upgrades: Wetted parts available in 316L stainless steel, 2205 duplex steel, titanium alloy, or PTFE-lined options, engineered for strong acids, alkalis, organic solvents, and other highly corrosive media. • Seals & Motors: Optional cartridge mechanical seals, double mechanical seals, explosion-proof motors (Ex d IIB T4 / Ex d IIC T4), and IE4 ultra-high-efficiency motors. • Structural Adaptation: Configurable inlet/outlet flange standards (ANSI/DIN/JIS/GB), reinforced base frames, pre-installed anti-vibration flexible joints, and custom low-noise acoustic enclosures. • Smart Expansion: Reserved ports for pressure, temperature, and vibration sensors. Supports seamless integration of VFD control cabinets, IoT remote monitoring modules, and PLC automatic alternation systems.
For customization inquiries, please contact us. Our engineering team will provide a tailored process solution within 48 hours.
Pre-Installation Checks: Verify foundation flatness ≤2mm/m, maintain ≥400mm clearance around for maintenance. Confirm piping is clean & free of slag. Max system pressure ≤1.6 MPa (System Pressure = Suction Pressure + Head).
Installation Key Points:
1.Mount pump horizontally. Inlet/outlet flanges must align naturally. Never use pump body to absorb pipe stress. Install flexible rubber joints at inlet/outlet.
2.Inlet piping must ensure positive pressure priming or install a foot valve. Ensure pump chamber is fully filled before startup to prevent cavitation & dry running.
3.Motor junction box faces outward. Secure cable along pipe wall. Grounding resistance ≤4Ω. Protection rating ≥IP55.
4.Before initial startup, manually rotate shaft 3 turns to confirm smooth operation. Jog test to verify rotation direction (clockwise from motor end).
Commissioning Process: Prime & vent → Jog test for direction → No-load run 5 min → Slowly open discharge valve to rated duty → Record current/pressure/vibration/noise/temp rise → Acceptance sign-off.
Request the “ISW Series Horizontal Centrifugal Pump Installation & Maintenance Manual” (PDF/English version) for complete dimensional drawings, bolt torque tables, and commissioning logs.
Q1: How to calculate actual system pressure for ISW pumps?
System Pressure = Suction Pressure + Rated Head Pressure. Verify pipeline rating ≤1.6 MPa before operation; specify over-pressure requirements for cast steel wetted parts upgrade.
Q2: How does direct-coupled structure prevent vibration from motor-pump shaft misalignment?
Precision alignment (runout ≤0.05 mm) completed at factory. Installation only requires level foundation + natural flange alignment. Install flexible joints to absorb pipe stress.
Q3: How to select mechanical seals for media containing fine particles?
Standard single mechanical seals suit clean water. For particulate media, upgrade to wear-resistant dual mechanical seals (with flush plan Plan 53B) and install filters (precision ≤0.5 mm).
Q4: How does ISWD low-noise model achieve ≤55 dB(A) operating noise?
Triple noise-reduction design: ① High-precision G6.3 balanced impeller; ② Low-noise bearings + acoustic enclosure in motor; ③ Optimized flow passage to reduce turbulence. Tested ≤55 dB(A) @1m at full load.
Q5: Can explosion-proof models (ISWY/ISWHY) be used in Zone 1 hazardous areas?
Explosion-proof motors are Ex d IIB T4 certified, suitable for Zone 1 (gas environments). For Zone 0 or IIC class (hydrogen/acetylene), specify during ordering for Ex d IIC T4 upgrade.
