S Series Single-Stage Double-Suction Pump

Product Overview

Traditional single-suction pumps suffer from high axial thrust, excessive vibration, and complex maintenance requiring full pipeline disassembly, increasing downtime and O&M costs in high-flow applications.

This series resolves these issues via a horizontally split-case, double-suction design with a statically balanced impeller and axial force self-balancing bearings. The top-access cover enables direct rotor inspection without disconnecting pipes or motors, while optional mechanical seals deliver high flow, low NPSHr, and reliable long-term operation.

Widely deployed in municipal water plants, industrial cooling, power generation, and large HVAC systems, it handles clean water ≤80℃ and abrasive media with customizable materials. Its rapid maintenance and stable performance establish a new industry benchmark for efficient split-case centrifugal pumps.

Product Advantages

Extended Service Life: Symmetrical double-suction impeller self-balances axial thrust with optimized bearings. Lifespan ≥15 years—35%+ longer than single-suction pumps.

Significant Energy Savings: Dual-suction inlet cuts flow velocity & NPSHr. Efficiency ≥85%, hydraulic losses ↓12–18%, reducing annual energy costs significantly.

Lower Maintenance Costs: Split-case cover with locating pins enables rotor extraction without pipe/motor disassembly. Seal/bearing inspection in 1.5h, cutting labor costs by 40%.

Lightweight & Compact Design: Streamlined cast iron casing + integrated base cuts footprint by 25%, reducing construction & lifting costs.

Faster Installation: Horizontally positioned ports + pre-aligned coupling enable stress-free pipe connection. Commissioning ready in 2h, accelerating deployment by 40%.

Application Scenarios

Municipal Water: Raw/clear water transport, main pipe boosting, stable high-flow supply.

Industrial Cooling: Power/chemical/metallurgical circulation, HVAC water loops, variable-flow energy saving.

Agriculture: Large-scale irrigation, river/reservoir lifting, sandy/muddy water compatible (wear-resistant options).

Public Facilities: Fire/AC water systems for stadiums/airports/data centers, low-noise, high environmental compliance.

Media: Clean water ≤80°C or similar. Sandy/muddy water: wear-resistant upgrades available. Packing/mechanical seal optional.

Technical Parameters

Product Structure Diagram

Type A Arrangement (Rolling Bearing)

NO.	Component List	NO.	Component List
1	Pump Casing	12	Gland
2	Casing Cover	13	Sleeve Nut
3	Shaft	14	Stud Bolt
4	Impeller	15	Bearing Cover
5	Double Suction Wear Ring	16	Bearing Spacer
6	Key	17	Bearing Housing
7	Shaft Sleeve	18	Set Screw
8	Lantern Ring Sleeve	19	Bearing Housing Cover
9	Gland Packing	20	Bearing
10	Lantern Ring	21	Round Nut
11	Gland	22	Coupling Assembly

Type B – Sleeve Bearing

NO.	Component List	NO.	Component List
1	Ball Bearing	8	Type A Housing / Type A Cover
2	Type B Housing / Type B Cover	9	Type A Upper / Lower Bearing
3	Type B Upper / Lower Shell	10	Vernier Scale
4	Oil Ring	11	Vent Pipe
5	Bearing Seal Ring	12	Small Check Valve
6	Oil Deflector	13	Seal Flush Line
7	Dowel Pin	/	/

Performance Data Table

Sh Series – Performance Data  1

Sh Series – Performance Data  2

Sh Series – Performance Data  3

Sh Series – Performance Data  4

Operating Conditions

Media:

Type: Clean water / Similar liquids / Sandy-muddy water (wear-resistant options)

Solids: General suspended solids (no large particles/fibers)

Temperature:

Media: ≤80°C (≤176°F) • Ambient: ≤40°C (≤104°F)

Bearing & Lubrication:

Type A: Rolling bearing, grease-lubricated

Type B: Sleeve bearing, oil-lubricated

Packing drip: ~1 drop/min

Installation:

Suction/Discharge: Horizontal suction; H/V discharge optional

Foundation: Horizontal install; ≥600mm (≥24″) maintenance clearance

Note: Special conditions (high temp/corrosion/sand/explosion-proof)? Consult before selection. Custom solutions available.

Compliance & Certifications

National Standard Compliance: Strictly manufactured per GB 5657-1995 “Technical conditions for centrifugal pumps”. Hydraulic performance & mechanical safety 100% compliant. Third-party full performance curve test reports available.

Material & Environmental Certification: Cast iron/bronze/stainless steel wetted parts supplied with material certificates, compliant with RoHS/REACH directives, meeting multi-media transport compliance.

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) + impeller static balance calibration + packing drip rate test (1 drop/min), guaranteeing zero-defect delivery.

OEM & CUSTOM

Fast Standard Delivery: Covers standard high-flow applications. Standard cast iron body + soft packing seal + Type A/B bearing configuration. Technical confirmation & sample prototyping within 72 hours.

Deep Customization Capabilities:

Material Upgrade: Impeller/seal ring/sleeve optional in bronze, 304/316 stainless steel, or wear-resistant alloys for sandy-muddy or mildly corrosive media.

Seal & Bearing: Optional mechanical seals (zero-leakage), rolling/sliding bearing conversion, Type B independent oil-lubrication temperature control.

Structural Adaptation: Clockwise/counter-clockwise rotation switching, inlet/outlet orientation adjustment, belt drive replacement, outdoor rain/dust-proof canopy.

Intelligent Expansion: Pre-wired vibration/temperature sensor interfaces; supports condition monitoring, IoT remote inspection, multi-pump parallel control.

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

Installation Guidelines

Installation Key Points:

1.Clean base, level with spirit level (wedge iron allowed). Grout anchor bolt holes. Re-tighten & re-check levelness after curing.

2.Provide independent supports for inlet/outlet pipes. Never use pump body as support. Install debris screen at inlet, gate valve at outlet.

3.Maintain coupling gap per spec. Measure outer circle deviation ≤0.1 mm (up/down/left/right), end gap deviation ≤0.3 mm (full circle). Use thin shims for concentricity.

4.Adjust packing gland to 1 drip/min leak rate (prevent overheating/wear). Before startup, manually rotate shaft 3 turns to confirm smooth, friction-free operation.

Commissioning Process: Close outlet gate valve → Prime & vent pump → Start motor → Open pressure gauge cock → After normal RPM, gradually open outlet valve to required duty → Record current/pressure/vibration/bearing temp → Acceptance.

Request the “Sh Series Horizontal Split-Case Centrifugal Pump Installation & Maintenance Manual” (PDF/English version) for complete dimensional drawings, assembly diagrams, and commissioning logs.