Guide Specifications

1.0General

1.1High temperature separator style HEPA filters shall be Alpha HT models as manufactured by Flanders.

1.2Filter sizes, capacities and construction optio s shall be as scheduled on the drawings.

2.0Filter Construction

2.1The filter pack shall be constructed by pleating a continuous sheet of non-woven water- esistant fiberglass media around hemmed-edge corrugat- ed aluminum separators.

2.2The filter pack shall be s al d into a (409 stain-

less steel) (304 s ainl ss s l) frame with a high temperature silicone sealant rated for 500°F or a glass pack sea ant ra ed for 1,000°F in exhaust appl cat ons.

2.3(A chlorastic s l cone gasket) (a woven glass gasket) shall be provided to seal the filter in the mounting device (Gasket Seal). A silicone gel shall be provided in a channel on one side to seal the filter in the mounting device. filters with silicone g l have a maximum service tempera- ture of 390°F (Gel Seal)

3.0Performance

3.1Initial and final resistances shall not exceed the scheduled values.

3.2Alpha HT HEPA Filters shall have a minimum efficiency of 99.97% on 0.30 micrometer parti- cles when tested at rated capacity on a Q-107 Penetrometer. Each filter shall be challenged with an approved nearly monodispersed oil aerosol of 0.30 micrometer size. Measure the upstream and downstream concentration of these particles with a light scattering photometer, determine the penetration and calculate the effi- ciency.

3.3Alpha HT Scan Tested HEPA Filters shall have a minimum efficiency of 99.99% on0.30microme- ter particles. Scan Testing shall be in accor- dance with Section 6.2 of IEST-RP-CC034.1. The scan test shall consist of challenging the fil- ter with a high concentration of an approved oil aerosol or PSL Spheres. Utilizing a photometer or particle counter, the media pack and the pack- to-frame seal shall be scanned to insure that there are no leak greater than .01% of the upstream concentration at 100 fpm face velocity.

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Honeywell 11255 manual General

11255 specifications

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