Pcp screw pump spare parts coupling stator rotor threaded rod bushing sucker rod

Introduction of screw pump rotor1The center part of the screw pump is composed of rotor and stator. Screw rotors are usually made of metallic materials and are made into unique twist angles through special cutting machines. A special structure consisting of a steel rotor and an elastic stator makes it capable of conveying materi

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Pcp Screw Pump Spare Parts Coupling Rod Stator Rotor Threaded Rod Bush Sucker Rod
Pcp Screw Pump Spare Parts Coupling Rod Stator Rotor Threaded Rod Bush Sucker Rod
Pcp Screw Pump Spare Parts Coupling Rod Stator Rotor Threaded Rod Bush Sucker Rod
Pcp Screw Pump Spare Parts Coupling Rod Stator Rotor Threaded Rod Bush Sucker Rod
Pcp Screw Pump Spare Parts Coupling Rod Stator Rotor Threaded Rod Bush Sucker Rod

Introduction of screw pump rotor

1The center part of the screw pump is composed of rotor and stator. Screw rotors are usually made of metallic materials and are made into unique twist angles through special cutting machines. A special structure consisting of a steel rotor and an elastic stator makes it capable of conveying materials containing solid particles.

2 The rotor is placed in the stator, sealed together in a helical structure. When the rotor rotates, the internal continuity of the stator is running, the liquid in the closed space runs continuously, conveying out from the suction side of the "No pulsation" and "quantitative" transmission.The outer thread and the thread of the rotor are made according to the special processing;

 

Material of rotor

Carbon steel, stainless steel, SS304, SS316L,904L etc.

The material of rotor my company commonly used: 40Cr, Cr12mov,SS304, SS316L, 2205 and 904L

 

Screw pump with different rotor /stator geometries, operating method and conveying principle

The/geometric shape belongs to a single head screw/rotor. With a circular cross-section, a large pitch and a large thread depth, the depth is constantly changing as the rotor rotates in the stator. The cross-section of the stator is the same as that of the rotor, however, the stator is a two-headed internal thread 180 ° apart, and when the stator and the rotor are meshed together, they form 1/2 stator cavities. When the rotor rotates, the continuous forward cavity between the rotor and the stator moves the medium in which the packet is delivered smoothly and continuously from the suction end of the stator to the discharge end.

The flow rate is determined by the pitch, diameter and eccentricity of the rotor/stator, and the speed of the pump.

The outlet pressure depends on the series and the pressure difference of maximum 6bar 85psi per level,

The 2-stage screw pump with s-shape geometry can achieve a pressure difference of 12bar 170psi and hundred percent of flow.

The shape of a single-stage screw pump with L-shaped geometry is the same as that of the S-shaped 2-stage pump, with the same diameter and eccentricity. The rotor/stator screw pitch of L-shaped geometry is twice times than with the S-shape geometry. Therefore, compared with the S-shape geometry with the maximum pressure difference of 6bar 85psi, this pump can be twice times flow of it.

 

    

Double head thread geometry stator 

The rotor of the double head thread has the Ellipse cross section big pitch and the big thread depth, the rotor is the eccentric circular rotation movement in the fixed stator, the stator also has the same geometrical shape as the rotor, but the stator has a three-head thread which is 120 ° apart.

When the stator and the rotor areocclusal, the 2/3 geometric cavities are formed between them, and when the rotor rotates, the continuous forward cavity between the rotor and the stator is transported smoothly and continuously from the suction end of the stator to the discharge end.

The flow rate is determined by the screw pitch, diameter and eccentricity of the rotor/stator, and the speed of the pump. The outlet pressure depends on the series and the maximum pressure difference 6bar 85psi per level.

The cavity size of the two-headed thread geometry is about 75% of the S/L type, but its cavity is opened two times per turn, and the 1/2-level geometry of the cavity is only opened once per turn,

So it is increases 50% flow rate each turn for the double head thread geometry of the rotor/stator than the S/L type,

Two-head thread geometry of the 2-stage screw pump,  with  150% flow rate more than S geometry single stage pump, achieve maximum pressure difference 12bar 170psi.  

Double head thread geometry shape dimension of 1-stage  is same as screw pump and 2-stage screw pump, the ellipse and eccentricity are the same too. But the screw pitch is twice times the rotor/stator of the two-head 2-stage shape. So with the maximum pressure difference of 6bar 85psi, this pump produces 300% of the flow ratio than S-shape geometry 

 

 

S T D factory availability 

1)There are all kinds of accessories in the  S T D's factry, we offer a fast turnaround to help reduce the downtime of  equipment, you don't need to have a lot of inventory.

2)For the spare parts, can be quickly shipped,  to ensure that the production won't be interrupted or reduced to the minimum downtime. With good service and very competitive price, customer can earn time an profit from the cooperation with us.   

 

Highly competitive pricing 

During customers become more and more focused on running and maintaining costs,in evaluating the conservation and efficiency of factory, we need to consider priority the price and supply capacity of spare parts.

 

STD company  is using their engineering knowledgeand production capacity,  is capable of producing excellent quality and price competitiveness spare parts ( the spare parts of NETZSCH, SPEEDEX, MONO ,VISCOTEC, STD etc. )

 

Quality Assurance 

S T D is a professional R & D and manufacturer of single screw pump and the spare parts, product quality was inspected and approved by customers in professional market, has won customer's recognition and highly praise.

 

S T D Universal Parts overview

S T D has a reputation for quality in both equipment and parts.  Over recent years it has been our mission to use our manufacturing and engineering expertise to expand our product offering to include a range of high quality  S T D  Universal Parts, suitable for many other brands of progressing cavity (PC) pumps.

We provide S T D  Universal Parts to be used with the following ranges of other brands of progressing cavity pumps.  For others not listed, please contact S T D 

1) NETZSCH™  2) SEEPEX™  3) MONO™

 

International excellent brand screw pump parts supply

STD use their own expertise, manufacturing capabilities and channels to provide the world's major brands (Germany's Netzsch,Seepex, Mono,and so on) a full range of screw pump parts, these accessories performance is good, rugged, durable, including: stator, rotor, transmission shaft, joint shaft, PIN, PIN, or a complete set of rotating parts, etc. 

 

 


 

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