High Temperature Resistant Filter Element
Polypropylene is rated to 80 °C and loses differential pressure capability well before it gets there. The standard workaround on a hot line is to oversize the housing and change elements more often. That is a cost, not a fix, and it hides a second problem: a pleat pack that relaxes under heat loses effective area, so the stage stops behaving predictably.
The PBT element is polyester, rated to 120 °C. It holds its pleat geometry at temperature, which means differential pressure rises smoothly instead of stepping. It uses the same 2.7″ (69 mm) body, the same 10″ to 40″ lengths and the same DOE and SOE end cap patterns as a standard cartridge, so it drops straight into existing housings.
- Micron Rating
- 0.2–50 µm
- Flow Rate
- 1–5 GPM per 10"
- Max Temperature
- 120°C
- SKU
- PBT
- Rated to 120 °C — well past the practical ceiling of a PP pleat
- Polyester media — holds pleat geometry under heat
- Drop-in fitment — standard 2.7" body, DOE and SOE end caps
- Grades 0.2 to 50 µm
- Integrity tested, cleanroom produced
- ISO 9001 with batch documentation on request
| Series | PBT |
| Filter media | Polyester, pleated |
| Micron rating | 0.2–50 µm |
| Outer diameter | 2.7" (69 mm) |
| Length options | 10" · 20" · 30" · 40" |
| End cap | DOE · SOE (226 fin, 226 flat, 222 fin, 222 flat) |
| O-ring / gasket | Silicone · NBR · Viton · EPDM |
| Flow rate | 1–5 GPM per 10" element (suggested) |
| Max. differential pressure | 4 bar at 21 °C · 2.4 bar at 80 °C |
| Max. temperature | 120 °C |
| Certifications | Cleanroom production · integrity tested · ISO 9001 |
| Minimum order | 10 pieces |
| Lead time | 15 working days |
- Petrochemical: hot process streams and solvent recovery.
- Oil and gas: amine and glycol circuits above PP’s ceiling.
- Hot process water: continuous elevated-temperature duty.
- High temperature service: where a PP pleat relaxes under load.
| Polypropylene | Polyester (PBT) | |
|---|---|---|
| Max. temperature | 80 °C | 120 °C |
| Practical continuous duty | Below 60 °C | Sustained hot service |
| Behaviour under heat | Pleat pack relaxes, area falls | Holds geometry |
| Fitment | Standard 2.7" | Identical — direct swap |
The swap needs no housing change and no re-plumbing. Where a stage is currently being nursed through hot duty on oversized PP, this is usually a straight substitution with a longer interval and a more predictable pressure curve.
An element rated to 120 °C behind a seal rated to 90 °C is a stage rated to 90 °C. On high-temperature duty the seal is frequently the lower of the two, and it is the component that gets specified by habit.
Four seals are offered — Silicone, NBR, Viton and EPDM. On hot hydrocarbon service Viton is the usual specification. Confirm it against the fluid and the working temperature together, because compatibility that holds at ambient does not necessarily hold at 120 °C.
Send the fluid and the operating conditions with the enquiry and Pullner will confirm both element and seal before quoting.
Up to two samples ship worldwide free of charge, with freight paid by the customer.
Why Choose Pullner Filter?
More than just a supplier – we’re your technical partner in filtration solutions
Laboratory and Testing Facilities
In-house testing capabilities for materials and quality assurance with advanced equipment and certified technicians.
- Particle counting analysis
- Pressure drop testing
- Material compatibility testing
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Position as technical partner, not just supplier. Custom solutions for your unique challenges.
- Custom filter design
- System optimization
- Technical consultation
Free Services
Comprehensive free services to support your filtration needs without any hidden costs.
- Free testing for filtration systems
- Free custom filtration design
- Up to 2 free samples
Global Manufacturing
State-of-the-art manufacturing facilities with worldwide delivery capabilities and local support.
- ISO 9001 certified facilities
- Global logistics network
- Local technical support
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