Home About HongtekFiltration ProductsApplicationsSupportNewsContact Us
Home >> Filtration Products >> Liquid Filtration >> String Wound Cartridges >> PSW Series PP String Wound Cartridge Filters
PSW Series PP String Wound Cartridge FiltersPSW Series PP String Wound Cartridge FiltersPSW Series PP String Wound Cartridge Filters

PSW Series PP String Wound Cartridge Filters


PSW Seires PP String Wound Cartridge Filters are manufactured with honeycomb construction with FDA approved polypropylene wound yarn material, with outer layers loose while inner layers  tight. Hongtek uses computer modeling process which optimizes pp string wound cartridges geometrically and maximizes the use of cartridge surface area by the diamond-shaped depth filtration cones.

PP wound cartridges strengthen the density design to provide high flow rate, low pressure drop and excellent dirt holding capacity. PP string wound filters are effective in many industrial processing, such as pre-RO filtration, food & beverage, chemical filter solution, waste water treatment and petrochemical process etc. PP string wound cartridges are economical solutions to reduce fine sediment, including sand, silt, rust and scale particles.

Filter MediaPolypropylene
Length5", 9.75", 9.8", 10", 20", 30", 40", 50" (According to customers requirements)
Inside Diameter28mm, 30mm (Special ID can be customized)
Outside Diameter2.4"(61mm), 2.5"(63mm), 2.55"(65mm)  Special OD is accepted
Filtration Rating1μm, 5μm, 10μm, 20μm, 30μm, 50μm, 75μm, 100μm
CorePP, SUS304, SUS316
Gasket/O-ringSilicone, EPDM, Viton, Buna
End CapDOE, 222/Flat(SOE), 222/Fin(SOE), 226/Flat(SOE), 226/Fin(SOE)


● Wide chemical compatibility and long service filter life lead to cost savings

● Large surface area enhances pp string wound cartridges filtration efficiency

● PP wound cartridges have wide variety of applications and diverse range of removal ratings

● Honeycomb construction of pp wound filters offer consistent performances of high dirt holding capacity

● PP wound cartridges have graded pore structure for efficient removal of a wide range of particle sizes

● 100% FDA approved polypropylene wound yarn material permits no odor, foaming, adhesives and no fine fibre dropping out

Food & BeveragePre-RO water filtration PCB industry 
Drinking water filterChemical filter solutionElectroplate liquid filtration
Petrochemical processPharmaceuticals processElectronics and Semiconductor


Operation Data for PP String Wound Cartridge Filters

Maximum Operating Temperature60 ℃(140℉)
Max. Differential Pressure2.7 bar at 27 ℃(50 psi at 80℉)
1.4 bar at 60 ℃(20 psi at 140℉)
0.7 bar at 82 ℃(10 psi at 180℉)
Liquid Flow DirectionOutside to inside
Recommend Change out Differential Pressure1 bar (14 psi)

Pressure Drop vs Flow Rate of 10" PP String Wound Cartridge Filters


Tech Support
Construction of PP String Wound Cartridge Filters

● The picture is the cross-section of pp wound cartridges

● High dirt holding capacity,high flow rate and long service time

● From outer layers to inner layers the wound yarn are loose to tight

● Honeycomb construction without using adhesives and no fine fibre drop out

● Multilayered structure and depth filtration pattern ensure good filtration efficiency

● High quality pp string wound filters for compatibility with wide range of process fluids

Production of PP String Wound Cartridge Filters


Wound Yarn Materials: All pp wound yarns are made of high quality FDA approved nonpollution pp materials, so keep the advantage of filter material industry

Filters Workshop: One of largest workshop of pp string wound filters China, high out put & fast delviery time, superior quality, excellent management system

Wound Cartridges Warehouse: Scientific storage and warehouse of pp wound cartridges are also important, clean and moisture-resistant warehouse to the benefit of good delivery efficiency

Container Shipment: PP string wound cartridges are convenient to be loaded into containers, forklift is quick action for cartons or pallets, save some spaces and times, safety transport for the shipment

Order Information
PSWIDODMicron RatingLengthCore MaterialEnd CapGasket/O-ring

PSW Series 

PP String Wound Cartridge Filters

A = 28mmC = 61mm1 = 1μm5 = 5"P = PPD = DOES = Silicone
5 = 5μm9.75 = 9.75"
M = 63mm10 = 10μm9.8 = 9.8"T = 222/Flat(SOE)E = EPDM
20 = 20μm10 = 10"S4 = SUS 304
B = 30mm30 = 30μm20 = 20"O = 222/Fin(SOE)V = Viton
F = 65mm50 =  50μm30 = 30"
75 = 75μm40 = 40"S6 = SUS 316P = 226/Flat(SOE)U = Buna
100 = 100μm50 = 50"L = 226/Fin(SOE)

For Example:


PSW Series PP String Wound Cartridge Filters - 28mm - 63mm - 5μm - 40" - PP Core - Double Open End (DOE)

Special specifications PP String Wound Cartridge Filters can be customized, such as special ID, OD, length and end caps etc.