About us
Kefilbao Filter Technology (Suzhou) Co., Ltd. is a high-tech company specializing in bag filters and folding filter elements, integrating product research and development, production, and sales.

SPSTJS sterilizing Grade Filter Polyethersulfone Cartridges are 100% integrity tested, it is constructed of double-layer hydrophilic asymmetric polyethersulfone membrane. It offers broad chemical compatibility, high flow rates at low pressure drops, and low extractables.
Polyethersulfone is particularly suited for the filtration of products that contain substances that adsorb to the media, The lower binding characteristics of polyethersulfone make it a good choice for filtration of valuable protein solutions such as vaccines and biologicals
Typical Application:
Cell Culture Media
Large Volume Parenterals (LVP's)
Pharmaceutical Bulk Chemical Solutions
Diagnostics
Blood and Serum Fractions
Purified Water
Beer, Wine and Spirits
Juice & Soft Drinks
Bottled Water
Sanitization/Sterilization:
AFiltered Hot Water90℃ (194°F), 30 minutes, multiple cycles, max 3 psid forward flow.
Autoclave 121℃ (250°F), 30 min, multiple cycles In-line Steam 135℃ (275°F), 30 min, multiple cycles.
Maximum Operating Parameters
Differential Pressure
• Forward 50 psid (3.4 bard) at 20°C (68°F)
• Reverse 40 psid (2.7 bard) at 20℃ (68°F)
Operating Temperature 82℃ (180°F) at 10 psid (0.69 barg) in water
Recommended Change out Pressure: 35psid (2.4barg)
Toxity:
All components meet the specifications for biological safety per USP Class VI-121℃ for plastics.
Construction Materials
Filter Membrane: PES
Media Support: Polypropylene
End Caps: Polypropylene
Inner Core: Polypropylene
Outer Cage: Polypropylene
Sealing Method: Thermal Bonding
O-rings: Buna, Viton (or FKM), EP, Silicone, Encapsulated Silicone, Encapsulated Viton (or FKM).
Food Safety Compliance:
Materials of construction comply with FDA regulations for food and beverage contact use as detailed in the US Code of Federal Regulations, 21CFR.Materials used to produce filter media and hard ware are safe for use in contact with foodstuffs in accordance with EU Directives 10/2011.
Integrity Test Specifications (Wetted membrane)
| Pore size | Minimun Bubble Point |
| 0.1µm | 2.2barg(Water/IPA) |
| 0.2µm | 3.8barg |
| 0.45µm | 2.7barg |
Ordering Information:
| SPSTJS | Pore size | Area | Endcaps | Seal | Connection Support |
| 0021=0.2/0.1µm 0042=0.45/0.2µm 0062=0.65/0.2µm 0104=1.0/0.45µm 0108=1.0/0.8µm | H=500cm^2 S=1000cm^2 D=1500cm^2 L=2000cm^2 | A=116 w/o locking groove B=116 w/ locking groove C=116 w/ locking groove, ss ring D=118 double o-ring E=118 w/short lugs (Pall replacement) F=118 w/longlugs (Sartorious replacement) G=1/2"NPT threaded H=123 double o-ring I=126 double o-ring J=1"TC K=80mm skirting L=1/2"TC M=1/2"BSPT N=123 double o-ring O=AS116 (Pall replacement) P=AS116 (Parker replacement) Q=1/2"BSPP | B=Buna-N E=EPDM S=Sione V=Vition | S=SS reinfocement |