Progressive Cavity Pump Rotor and Stator Selection Manufacturer

Progressive Cavity Pump Rotor and Stator Selection

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Shape Selection of the Stator and Rotor

Type A
Short pitch, single head
Thread number of stator and rotor: 1/2
Standard design, stable function, common pump

Type B
Long pitch, single thread
Thread number of stator and rotor: 1/2
Suitable for low pressure and big flow

Type D
Short pitch, double thread
Thread number of stator and rotor: 2/3
Suitable for the converying of corrosive media

Type P
Long pitch, double head
Thread number of stator and rotor: 2/3
Suitable for transmission of corrosive substances, low pressure and large flow

Materials for rubber parts of Subtor progressive cavity pumps

Material	Corrosion resistance	Swelling resistance	Abrasion resistance	High temperature resistance	Temperature range	Application
NBR	Satisfactory	Good	Satisfactory	Satisfactory	+110℃	Petroleum, sewage, food, beverage, chemical, papermaking
NBRH	Good	Excellent	Good	Satisfactory	+120℃	Petroleum, refining and chemical, chemical, sewage
EPDM	Good	Poor	Good	Satisfactory	+120℃	Chemical, chemical agent, papermaking
FKM	Excellent	Excellent	Poor	Excellent	+180℃	High temperature and corrosive medium
HNBR	Excellent	Good	Good	Excellent	+170℃	Petroleum, petrochemical, chemical
PTFE	Excellent	Excellent	Poor	Excellent	+230℃	Corrosive medium(acid, alkali and etc), food and beverage industry

Materials for the stator of Subtor progressive cavity pumps

Common metal materials	Corrosion resistance	Abrasion resistance	Cl-resistance(ppm)	Suitable medium
CRS alloy steel	Common	Common	No resistance	Abrasive mediums without corrosiveness
CRS alloy steel with hardening treatment	Common	Excellent	No resistance	Abrasive mediums without corrosiveness
SS420 stainless steel with hardening treatment	Satisfactory	Good	No resistance	Abrasive mediums with light corrosivness
SS304 stainless steel	Good	Satisfactory	< 100	Applied in food production, acidic mediums without abrasiveness
SS304 stainless steel with hardening treatment	Good	Good	< 100	Non food applications, corrosive and abrasive mediums
SS316	Good	Satisfactory	100~2000	Applied in food industry, acidic mediums with no abrasivness
SS316 stainless steel with hardening treatment	Excellent	Excellent	100~2000	Non food applications, corrosive and abrasive mediums
Duplex SS stainless steel	Excellent	Excellent	1000~40000	Corrosive mediums with high Cl- but no abrasiveness
Duplex SS stainless steel with hardening treatment	Excellent	Excellent	1000~40000	Corrosive medium with high Cl- and abrasiveness

Note: For all the stators and rotors above, you can choose their type according to your necessary conditions or requirements. Contact us for more details.