TOP ENTRY BALL VA LV ES - Conbraco Industries - #19

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Seat Performance Data Insert Seat Ring Figure 1 Insert Seat Ring Figure 2 Insert Seat Holder Figure 3 Seal Figure 4 O-Rings #1 (PTFE) General application seat material, exhibiting lowest operating torque and excellent resistance to chemical attack. (Figure 1) Reference chart 1 #2 (RPTFE) Most commonly specified seat material, and used as the basis for published torque values. Maintains the excellent chemical resistance of unfilled Teflon® (PTFE) with increased resistance to wear and abrasion resulting in longer life. (Figure 1) Reference Chart 2 #3 (RPTFE w/Inner Ring) Features a metallic inner ring to improve abrasion resistance particularly in high solids or throttling applications. Maintains the other features of the #2 seat. (Figure 2) Reference Chart 2 #7 (API 607 Cert. PTFE) to 450°F This seat design has been successfully tested to the requirements of API 607, fourth edition. The PTFE seat is fully confined by a metallic seat holder which provides a secondary seal in the event of the loss of the primary PTFE seal due to a fire. As the seat seal material is PTFE, chemical and torque characteristics will be the same as in the #1 seats. (Figure 3) Reference Chart 1 #A (API 607 Cert. RPTFE) to 500°F This seat design has been successfully tested to the requirements of API 607, fourth edition. The RPTFE seat is fully confined by a metallic seat holder which provides a secondary seal in the event of the loss of the primary PTFE seal due to a fire. The seat holder can perform the same function as the inner ring found in the #3 and #5 seats making this design appropriate for abrasive and throttling applications. As the seat seal material is RPTFE, chemical and torque characteristics will be the same as in the #2 and #3 seats. (Figure 3) Reference Chart 2 #5 (55%Bronze/5%Moly BRTFE) Specifically intended for steam applications. Also applicable to abrasive and throttling applications because of the heavy loading of reinforcing materials and the presence of the inner ring. However, chemical compatibility may be a limiting factor in the application of this seat. (Figure 2) Reference Chart 3 “D” (60% Stainless Steel SRTFE) Intended for abrasive and throttling applications because of the heavy loading of reinforcing materials and the completely confined seat. (Figure 2) Reference Chart 2 #6 (UHMWPE) Ultra High Molecular Weight Polyethylene offers good abrasion resistance making it suitable for use in high solids or slurry applications. These seats are completely confined by a metallic seatholder enhancing their performance in abrasive services. This seat is frequently specified in services where fluorine off-gasing in even the slightest amounts is objectionable. Examples of these services are food, tobacco processing, and nuclear services. (Figure 2) Reference Chart 4 Top Entry Valves 19