Brand Overview of Pentair

Pentair delivers industry‑leading products, services and solutions to meet your evolving demands, providing services for global water treatment, fluid control, thermal management and equipment protection. We are committed to delivering industry‑leading solutions to help build a healthier and safer environment for all.

With a significant presence in global businesses, Pentair supplies critical products for key industries. Ranging from filtration, process management to fluid handling, equipment protection and thermal management, we continuously break through bottlenecks with innovative concepts and rigorous thinking. Leveraging profound expertise and in‑depth cooperation, we strive to shape a better future for the world’s most vital resources, equipment and infrastructure.

Brief Introduction to Pentair PWT‑Series Horizontal Single‑stage End‑suction Pumps

The PWT‑Series horizontal single‑stage end‑suction pump is a standard single‑stage end‑suction centrifugal pump with robust construction and excellent performance, developed by Pentair Water Group for the broad Chinese market. Its design, manufacturing and testing comply with or meet standards including ISO 5199 (GB/T5656) Technical conditions for centrifugal pumps‑Class Ⅱ and ISO 9906‑99 (GB/T3216‑2005) Rotodynamic pumps‑Hydraulic performance acceptance tests‑Grades 1 and 2. It is a widely‑adopted horizontal centrifugal pump worldwide.

Application Fields of Pentair PWT125‑100‑315DS

The PWT‑Series end‑suction pumps are suitable for transporting thin, clean, non‑explosive liquids free of solid particles and fibres. Main applications include: water treatment boosting, building water‑supply pressurization, building fire‑protection systems, air‑conditioning systems, seawater desalination, agricultural irrigation, landscape water circulation and other scenarios.

Our company professionally supplies spare parts for Pentair pumps, including mechanical seals, pump heads, pump shafts, bearings, couplings, impellers, as well as installation, maintenance and repair services. We provide mechanical seals, couplings, pump shafts, impellers, elastic buffer columns and other components for all models of Pentair PWT‑Series pumps. For enquiries, please contact Manager Gao: 13530329790.

Operating Conditions of Pentair PWT125‑100‑315DS

• Flow rate: 5～1800 m³/h

• Head: 2～250 m

• Standard rotational speed: 2900 rpm, 1450 rpm

• Operating pressure: 1.6 MPa; higher operating pressure applies for high‑head pumps

Operating pressure = Inlet pressure + Shut‑off pressure (Q = 0)

• Maximum allowable inlet pressure: Standard 4 Bar. Higher inlet pressure shall be specified upon order placement if required.

• Liquid temperature: ‑20℃～+80℃

• Inlet and outlet nominal diameters: Inlet φ50～φ350; Outlet φ32～φ300

Features and Advantages

• Non‑self‑priming, single‑stage volute centrifugal pump; single‑stage overhung horizontal pump with horizontal axial suction and vertical top centre discharge.

• Dimensional compliance with ISO 2858.

• Hydraulic design optimised by CFD technology, delivering stable performance and high efficiency.

• Modular design with six heavy‑duty power frames for the full series, offering a high level of part commonality.

• Short shaft overhang ratio and heavy‑duty pump shaft ensure long‑term stable and reliable pump operation.

• Back‑pull‑out construction: maintenance can be performed without dismantling the pump casing or connected piping.

• Selected high‑head models adopt double‑volute design to reduce radial force under off‑design operating conditions. This improves working conditions for mechanical seals and bearings, lowering pump vibration and noise.

• Connecting flanges for inlet/outlet can be manufactured per GB, ANSI or DIN standards.

Coupling

• Realign pump‑motor alignment whenever the pump casing, motor or complete pump set has been displaced.

• Extended‑length coupling is optional. Pump maintenance can be carried out without moving the motor or detaching the pump casing from piping, greatly facilitating servicing.

Bearings

• Standard configuration utilises globally renowned SKF sealed grease‑lubricated deep‑groove ball bearings, maintenance‑free for service life.

Shaft Seals

• Shaft seal options: mechanical seal or packing seal.

• Standard configuration: mechanical shaft seal complying with DIN 24960, silicon carbide versus graphite.

• Alternative mechanical‑seal types or packing seals are available according to conveyed fluid and service conditions.

Motor

• Standard fitted with Pentair totally‑enclosed fan‑cooled squirrel‑cage motor. Main dimensions conform to IEC and DIN standards.

• Mounting form: IMB3

• Protection class: IP55

• Insulation class: Class F with Class B temperature‑rise evaluation

• Maximum ambient temperature: 40℃

• 50 Hz Voltage ratings:

• 3 × 220/380 V (2.2 kW and below)

• 3 × 380 V delta‑connected (3 kW and above)

• Liquid temperature range: ‑20℃～+80℃

• Thermal protection: Motors of 3 kW and above are fitted with one PTC 150 ℃ sensor per phase (series‑connected) for over‑temperature protection. Additional motor‑protection features are available on request.