GSJH-type petrochemical process pump

Flow rate (Q): 7.5–280 m³/h
Operating temperature (T): -45～+450℃
Head (H): 80–330 m

Keywords:

Category:

Petroleum and Chemical Process Pump

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Product Description

　　Overview:
　　To meet the needs of modernizing China’s petrochemical facilities and to promptly adapt to equipment upgrades centered on energy conservation, we are developing products that comply with the internationally advanced AP1610 standards. Our company has introduced three series of petrochemical process pumps, one of which is the GSJH series of petrochemical process pumps.
　　The GSJH-type petrochemical process pump is used for the transportation of petroleum, petroleum products, and other substances in petroleum refining, petrochemical, and chemical industries. It fully complies with the American Petroleum Institute (API) Specification AP1610.
　　The GSJH-type petrochemical process pump features high reliability, long service life, and high efficiency.
　　Performance range:
　　Flow rate Q = 7.5–280 m³/h
　　Head H = 80–330 m
　　Temperature T: -45 to +450 ℃
　　　　(Special requirements can reach -196℃)
　　Model meaning:
　　GSJH4×6×14H-A
　　GSJH—Two-stage, single-suction, double-bearing centrifugal process pump
　　4- Pump discharge port diameter (inches)
　　6- Pump suction inlet diameter (inches)
　　14 - Maximum impeller diameter (inches)
　　H - Impeller Type Code
　　A—Number of impeller cuts, indicated by A, B, C…
　　Structural features:
　　The GSJH pump features a radially split pump casing design, making it particularly suitable for conveying high-temperature, high-pressure, flammable, explosive, or toxic liquids. It is installed with horizontal centerline support to minimize deformation and displacement caused by thermal expansion and contraction. Pumps with discharge diameters of 4 inches or larger are designed with dual-volute chambers to balance the radial forces acting on the pump. On all pump casings, the transition from the first-stage discharge to the second-stage suction is achieved through an integral casting of internal flow passages, with the two flow paths arranged symmetrically.
　　The pump can automatically bleed itself as long as there is pressurized liquid flowing through it. However, both the upper and lower sections of the pump’s volute housing are equipped with nipple ports. When the user needs to bleed air or drain liquid, they can open the ZG3/4 threaded hole and screw in an API plug at the job site.
　　The pump’s suction and discharge flanges are both oriented vertically upward and are integrally cast with the pump body. Their flange dimensions and pressure ratings are fully compliant with the 300 psi (pounds per square inch) standard class specified by the American National Standards Institute (ANSI). Depending on the operating temperature and material grade, the maximum allowable working pressure of these flanges can reach approximately 5 MPa (about 50 kgf/cm²).
　　For reliability, GSJH-type process pumps all feature cast steel housings, which have undergone a hydrostatic pressure test of 8.3 MPa (approximately 84 kgf/cm²).
　　The shaft seal chamber (packing seal) and the pump cover are cast as a single unit. This assembly can accommodate balanced mechanical seals, bellows seals, or tandem mechanical seals. Pumps with an inlet diameter of 3 inches can also be fitted with packing seals. The exterior of the shaft seal chamber is cast with an optional water-cooling jacket. The provision of a water-cooling jacket must either be specifically requested or applied when the conveyed medium is water at temperatures exceeding 66°C, or when the conveyed hydrocarbon medium exceeds 150°C. When the conveyed medium requires thermal insulation, low-pressure steam or other insulating media can also be passed through the jacket. The hydrostatic test pressure is 1 MPa (approximately 10 kgf/cm²). The cooling water inlet connection, ZG1/2", is located below the pump cover, while the outlet connection, ZG1/2", is situated above the pump cover. The steam inlet connection, ZG1/2", is located above the cover, and the steam outlet connection, ZG1/2", is located below the pump cover.
　　The impeller is a one-piece casting and is dynamically balanced together with the rotor. It is connected to the shaft via a keyway transmission, and the rotor is supported at both ends. Both the casing sealing ring and the impeller sealing ring are standard, replaceable components; their excellent fit is ensured by the materials used and their differing hardnesses. Axial force balance is achieved through the symmetrical installation of the suction ports on the two impellers.
　　The pump features bearing housings of identical size at both ends, made of either cast steel or cast iron. These housings are securely fastened to the bracket (bearing frame) with screws and positioned precisely using mating locating shoulders. At the coupling end, a set of radial bearings is installed; at the opposite end, two thrust ball bearings are mounted back-to-back. The bearings are lubricated by oil splash rings, with an appropriately controlled oil level. The outer surface of the No. 11 bearing housing is cast with cooling fins, enabling air cooling (for temperatures below 120℃). Alternatively, fan cooling (for temperatures between 120℃ and 260℃) or water cooling (for temperatures up to 260℃) can be selected. Among these cooling options, fan cooling is particularly well-suited for regions where water resources are scarce or water quality is poor. This feature is what makes this type of process pump uniquely distinctive.
　　The bearing housing No. 09 does not have heat sinks on its exterior and cannot be cooled by a fan. When the operating temperature exceeds 120℃, water cooling must be used. If the pump bearing is cooled by a fan, the fan will replace the position of the dust shield. When the pump bearing is cooled by water, a water-cooling jacket is cast onto the outer surface of the radial ball bearing.
　　The bearings No. 11 are fitted with copper dust shields at both ends, which extend into the inner bore of the bearing housing. These shields not only prevent dust or water-based contaminants from entering but also help prevent oil leakage. In the unlikely event that the bearing should fail, these shields can still provide support.
　　For maintenance purposes, the impeller, bearings, and shaft seals can be easily removed without disassembling the suction or discharge piping. The pump is equipped with a flexible diaphragm-type extended coupling that features a tapered fit with the pump shaft, making assembly and disassembly exceptionally convenient.
　　Material for flow components:

Material Grade Materials Parts	S-4	S-6	C-6	A-8
Pump body, pump cover	ZG230-450	ZG230-450	ZG1Cr13Ni	ZGCr18Ni12Mo2Ti
Impeller	ZG230-450	ZG1Cr13Ni	ZG1Cr13Ni	ZGCr18Ni12Mo2Ti
Housing sealing ring	HT250	ZG1Cr13MoS	ZG1Cr13MoS	0Cr18Ni12Mo2Ti
Impeller seal ring	QT500-7	3Cr13	3Cr13	0Cr18Ni12Mo2Ti
axis	45	42CrMo or 35CrMo	3Cr13	Cr18Ni12Mo2Ti
Filler shaft sleeve	3Cr13	1Cr13 Tungsten Carbide Overlay	1Cr13 Tungsten Carbide Overlay	Cr18Ni12Mo2Ti
Mechanical seal shaft sleeve	1Cr18Ni9 or 3Cr13	1Cr18Ni9 or 3Cr13	1Cr18Ni9 or 3Cr13	Cr18Ni12Mo2Ti

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