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ESW Series String Wound Cartridge Filters For Power Plant Water TreatmentESW Series String Wound Cartridge Filters For Power Plant Water TreatmentESW Series String Wound Cartridge Filters For Power Plant Water Treatment

ESW Series String Wound Cartridge Filters For Power Plant Water Treatment


ESW Series String Wound Cartridge Filters are developed depth wound filters by Hongtek China, which are made of continuous filament yarn along with strong polypropylene and spiral stainless steel central cores. Length of 60 inchs & 70 inchs of wound cartridge filters are specially designed for boiler water systems of power plant production facilities. Extra-long fiber of power plant wound cartridges means longer and larger surface filtration area. Condensate wound filters possess wide chemical compatibility for oil, water, acids and alkalis, high flow rates, low differential pressures and long service life, so are qualified to meet requirements of increasingly stringent boiler feed water fields.

Filter MediaPP, Bleached Cotton, Glass Fiber(threadiness or twisting)
Length60"(1524mm), 70"(1778mm) According to customers requirements
Inside Diameter28mm, 30mm (Special ID can be customized)
Outside Diameter2.4"(61mm), 2.5"(63mm) Special OD is accepted
Filtration Rating1μm, 5μm, 10μm, 20μm, 30μm, 50μm, 75μm, 100μm
CorePP, SUS304, SUS316
Gasket/O-ringSilicone, EPDM, Viton, Buna
End CapDOE, Extended Core,  Extended Thread Adapter 1 3/16"(1.19") 24 threads/inch , Extended Thread Adapter 1/4" 20 threads/inch


● Power plant wound cartridges possess flow rate and long service life

● Power plant wound filter cartridges have high resist-pressure and no distortion

● 60" & 70" string wound cartridge filters have larger area for high flow applications

● DOE or extended stainless steel thread adapter, easy installation into existed housings

● Condensate wound filters own wide chemical compatibility for oil, water, acids and alkalis


● Condensate Filtration

● Cooling and Boiler Water

● Water filtration for power generation

● RO Prefiltration and desalination of sea water 


Operation Data for Power Plant Wound Cartridges

Maximum Operating TemperaturePolypropylene: 60℃(140℉)
Bleached Cotton with SUS Core: 150℃(300℉)
Glass Fiber with SUS Core: 400℃(750℉)
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℉)
Recommend Change out Differential Pressure2.0 bar (29 psi)

Tech Support
Construction of Power Plant String Wound Cartridges

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

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

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

● From outer layers to inner layers condensate wound filters are loose to tight

● Multilayered structure and depth filtration pattern ensure good filtration efficiency

● High quality condensate wound cartridges for compatibility with wide range of process fluids

Manufacturing, Packaging & Installation of String Wound Cartridge Filtersglass_fiber_wound_cartridges.jpg

Manufacturing: High quality FDA approved pp/cotton/glass fiber wound yarn materials and perfect quality management system to keep high output

Packaging: For 60" or 70" is extra long and heavy, also include some end caps, use non-fumigation wooden box packaging to keep safety in transportation

Installation: 60" or 70" string wound cartridges are easy to be installed into the housing and low maintenance cost, can help to save much labor cost and time

Order Information
ESWFilter MediaLengthIDODMicron RatingCore MaterialEnd Cap

ESW Series 

String Wound Cartridge Filters

PP = PP60 = 60"(1524mm)A = 28mmC = 61mm1 = 1μmP = PPD= Double Open End(DOE)
5 = 5μm
10 = 10μmEX = Extended Core
BC = Bleached Cotton20 = 20μmS4 = SUS 304
70 = 70"(1778mm)B = 30mmM = 63mm30 = 30μmT24 = Extended Thread
Adapter 1 3/16"(1.19")
24 threads/inch
GF = Threadiness Glass Fiber 50 =  50μm
75 = 75μmS6 = SUS 316T20 = Extended Thread
Adapter 1/4"
20 threads/inch
TF = Twisting Glass Fiber100 = 100μm

For Example:


ESW Series String Wound Cartridge Filters - Threadiness Glass Fiber - 60"(1524mm) - 30mm - 63mm - 5μm - SUS 304 - Double Open End (DOE)

Special specifications String Wound Cartridge Filters for Power Plant Condensate Filtration can be customized, such as special ID, OD, length and end caps etc.