Name: XS Double Suction & Split Case Centrifugal Pumps
Brand: Shijiazhuang First Pump Factory Co., Ltd.

XS Double Suction & Split Case Centrifugal Pumps

The XS Series of represents a new generation of high-performance, energy-efficient, single-stage, double-suction split-case centrifugal pumps. Designed as a comprehensive upgrade to older models like SH, S, SA, SLA, and SAP, these pumps are engineered for reliability, versatility, and reduced total cost of ownership. This series of pumps have a high degree of standardization and versatility, incorporating modern materials, operational stability and ease of maintenance.

Design Features & Advantages of XS Double Suction & Split Case Centrifugal Pumps

Robust & Stable Operation: A short spacing between bearing supports ensures smooth operation with minimal vibration and noise, allowing for potential operation at higher speeds and a wider application range.
Simplified Piping: The inlet and outlet nozzles are on the same centerline, facilitating straightforward, space-saving, and aesthetically pleasing pipeline layout.
Bidirectional Operation: The entire rotor assembly can operate in reverse, significantly reducing the risk of water hammer damage.
High-Temperature Capability: A unique high-temperature design featuring a centerline support, thickened casing, sealed cooling, and oil-lubricated bearings allows for operation with media up to 200°C, making it ideal for heating networks.
Installation Flexibility: The pump can be installed either horizontally or vertically to suit specific site conditions and can be fitted with either mechanical seals or gland packing.
High Efficiency: Utilizing an advanced hydraulic model, the XS pump achieves an efficiency 2-3% higher than comparable pumps, leading to significant operational cost savings.
Low NPSHr: The required NPSH is 1-3 meters lower than similar split-case pumps, reducing civil engineering costs and extending service life.
Customizable Material Configurations: A variety of material combinations for wetted parts (e.g., cast iron, ductile iron, stainless steel, bronze) are available to handle different fluids, including clean water, corrosive chemicals, and sea water.
Easy Maintenance: Features such as non-adjusting mechanical seals, elastic pre-stress assembly, and imported bearings make maintenance, disassembly, and reassembly simple and rapid, minimizing downtime.

Pump Supporting Program and Services of XS Double Suction & Split Case Centrifugal Pumps

We value the energy saving and environmental protection, by analyzing the requirements of media and operation environment, adopt optimal combinations of materials at the parts contact with media, insure security, reliability, economical operation.

Item	pump supporting program A	pump supporting program Q		pump supporting program B	pump supporting programs
Item	pump supporting program A	1	2	pump supporting program B	1	2	3
pump casing	Grey cast iron	Ductile cast iron	Ductile cast iron	Extra low carbon stainless steel	Ni一cr chromium cast iron	Ductile cast iron	Stainless steel
Impeller	Grey casting iron	cast steel	Stainless steel	Duplex S.S.	Tin bronze	Tin bronze	Tin bronze
shaft	#45 steel	#45 steel	Stainless steel	Duplex S.S.	2cr13	2cr13	2cr13
Shaft sleeve	#45 steel	#45 steel	Stainless steel	Extra low carbon stainless steel	1cr18NigTi	1cr18NigTi	1cr18NigTi
wear ring	Grey casting iron	cast steel	cast steel	Duplex S.S.	Tin bronze	Tin bronze	Tin bronze
Services	For pure water and lower strength applications	For pure water high strength applications		For media with more solid impurities, PH<6 chemical corrosion and for high strength applications	The sea water pump
These configurations are recommeded by the manufacturer, customers could change their materials according to specific needs.

Model Nomenclature Example: XS 250-450A-L(R)-J

XS: Advanced Split-Case Centrifugal Pump
250: Pump Outlet Diameter (mm)
450: Standard Impeller Diameter (mm)
A: Modified Impeller Diameter (omitted for max diameter)
L: Vertical Mount
R: Heating Water Type
J: Modified Rotational Speed (omitted for standard speed)

Primary Performance Parameters of XS Double Suction & Split Case Centrifugal Pumps

Pump Outlet Diameter (DN)	80 ~ 1000 mm
Flow Rate (Q)	22 ~ 16,236 m³/h
Head (H)	7 ~ 300 m
Operating Temperature (T)	-20°C ~ +200°C
Solid Particle Content	≤ 80 mg/L
Maximum Allowable Working Pressure	≤ 5 MPa

Structure I

	1	Casing
	2	Bearing Support
	3	Deep Groove Ball Bearing
	4	Lock Nut
	5	Skeleton Oil Seal
	6	Bearing Ring
	7	Bearing Cover
	8	Shaft Sleeve
	9	Mechanical Seal Cover
	10	Mechanical Seal
	11	Seal Bushing
	12	Casing Cover
	13	Impeller
	14	Impeller Ring
	15	Seal Cage
	16	Seal Housing
	17	Water Sealing Pipe
	18	Packing
	19	Packing Gland
	20	Bearing Liner
	21	Shaft
	22	Coupling

Structure II

	1	Bearing Support
	2	Lock Nut
	3	Disc Spring
	4	Bearing Liner
	5	Bearing
	6	Bearing Support Cover
	7	Bearing Cover
	8	Water Deflector
	9	Sleeve Nut
	10	Mechanical Seal Cover
	11	Shaft Sleeve
	12	Mechanical Seal
	13	Water Sealing Pipe
	14	Casing Cover
	15	Impeller
	16	Impeller Retainer
	17	Impeller Ring
	18	Gland Packing Sleeve
	19	Shaft Sleeve
	20	Gland Packing
	21	Seal Cage
	22	Packing Gland
	23	Sleeve Nut
	24	Coupling
	25	Shaft
	26	Casing

Structure III

	1	Casing
	2	Bearing Cover
	3	Lock Nut
	4	Bearing Support
	5	Deep Groove Ball Bearing
	6	Bearing Ring
	7	Mechanical Seal Cover
	8	Mechanical Seal
	9	Shaft Sleeve
	10	Casing Cover
	11	Impeller Retainer
	12	Impeller Ring
	13	Impeller
	14	Water Sealing Ring
	15	Stuffing Box Liner
	16	Cylindrical Roller Bearing
	17	Sleeve Nut
	18	Coupling
	19	Water Deflector
	20	Sleeve Nut
	21	Packing Gland
	22	Packing
	23	Seal Cage
	24	Shaft
	25	Base

Structure IV

	1	Casing
	2	Casing Cover
	3	Impeller
	4	Wearing Ring
	5	Shaft
	6	Seal Housing
	7	Packing Seal or Mechanical Seal
	8	Gland for Packing Seal or Mechanical Seal
	9	Shaft Sleeve
	10	Bearing Cover
	11	Bearing Support
	12	Bearing
	13	Skeleton Oil Seal
	14	Coupling
	15	Motor Stool
	16	Water Sealing Pipe
	17	Guide Bearing Seal Housing
	18	Guide Bearing Gland
	19	Lock Nut
	20	Shaft Sleeve
	21	Guide Bearing
	22	Shaft Sleeve
	23	O-ring
	24	Base

Key Applications of XS Double Suction & Split Case Centrifugal Pumps

XS pumps are ideally suited for a wide range of fluid transfer applications, including:

Water treatment plants
Air conditioning circulation systems
Heating network and district heating systems
Building water supply
Irrigation and drainage pump stations
Industrial water supply systems
Fire protection systems
Marine and shipbuilding industry
Mine dewatering and water supply

The XS Series Double-Suction Split-Case Pump is a modern, versatile, and economically efficient pumping solution. Its robust construction, operational flexibility, high efficiency, and low maintenance requirements make it an excellent choice for demanding applications across municipal, industrial, and commercial sectors.