描述
PMM® medium is a thin, sintered matrix of 316L stainless steel powder within the pore structure of stainless steel wire mesh filter. It combines the best qualities of Pall PSS® sintered powder medium and Pall Rigimesh® woven and sintered wire mesh medium. The PMM filter is designed so that the sintered bonds are at the points of contact, producing an extremely strong porous material whose wires do not shift and whose pore size integrity is continuously maintained. Designs are available suitable for temperatures up to 1250°F (677°C).
Specifications
Sizes
The standard PMM filters are cylindrical forms, 2-1⁄2" in diameter in 10" multiple lengths, up to 40". For AB style PMM filters consult the factory.
Performance
Operating Characteristics
Standard cartridges are capable of withstanding a minimum collapse differential pressure of 125 psid (8.6 bard) in the forward flow (outside-in) direction at up to 600°F† (315°C) and 10 psid (.7 bard) in the reverse flow direction. Optional design available for 50 psid (3.4 bard) reverse flow.
† Threaded connector series only. Due to seal limitations, 1000 Series suitable for applications up to 450°F (232°C).
Technical Information
Table 1. PMM elements and their characteristics
(1) Liquid removal efficiency ratings are based on a modified F2 test method and actual particle count data.
(2) Weight percent removal data is based on AC Fine Test Dust in air. Absolute retention ratings based on actual particle count.
(3) Pressure drop obtained by multiplying value shown by actual flow desired, viscosity of liquid in centipoise (if other than 1 cp), all divided by total filtration area selected. See Table II for areas.
(4) Pressure drop in obtained by multiplying value shown by actual gaseous flow rate desired, ratio of viscosities, all divided by total filtration area selected. See Table II for areas.
Segments
Type
Ordering Information
Table II. Standard Configurations of PMM Elements
■ ♦
| Code | Code | Nominal Length (in.) | Area ft2m2 | |
| 1 | 10 | 10 | 1.5 | .14 |
| 2 | 20 | 20 | 3.0 | .28 |
| 3 | 30 | 30 | 4.5 | .42 |
| 4 | 40 | 40 | 6.0 | .26 |
▲
| Code | Gasket Option |
| H13 (Std.) | Buna N (Nitrile) |
| H | fluorocarbon elastomer* |
| J | Ethylene Propylene |
| J7 | Ethylene Propylene for Steam Service |
| RE | Reinforced for 50 psid (3.4 bard) reverse flow |
*Trademark of E.I. du Pont de Nemours & Co.
●
| Code | Connection |
| 4 | 1″ NPT |
| 6 | 11/2 ″ NPT |
▼
| Code | Other Options |
| RE | Reinforced for 50 psid (3.4 bard) reverse flow |
| C9 | Cleaned for oxygen service |
Housing Information
A full selection of standard Pall industrial housings are available for PMM elements. Threaded connector elements are designed to fit a special line of housings capable of a broader range of temperature (cryogenic to 800°F) (426°C) and chemical service. Custom designed housings for specific applications are also available.
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