Flowrite TM Technical Bulletin Document No. 155-208P25 TB-137 March 7, 2005 Packing for 591/592 Flowrite Valves Siemens Industry, Inc. Description This bulletin provides a description of and recommended installation procedures for the 591/592 packing used in the Flowrite Valves. The following three types of packing are described: 1. Spring-loaded V-ring. 2. Split ring. 3. Solid ring product. Valve stem sizes of the various types and sizes of Flowrite Valves are shown in Table 1. The type of packing recommended for the various applications is shown in Table 2. Table 1. Valve Stem Sizes. Type of Valve Line Size (Inches) Stem Diameter at Packing Inches (mm) VF 591 CD 1/2 thru 2 1/4 (6.4) VF 591 CD 2 1/2 thru 4 3/8 (9.5) VF 591 WM 1/2 thru 2 1/4 (6.4) VF 591 WM 2-1/2 thru 6 3/8 (9.5) VF 591 DS 1 thru 4 1/4 (6.4) 5 thru 8 3/8 (9.5) VF 591 SD 3/4 thru 1 1/4 (6.4) 1-1/4 thru 2 3/8 (9.5) VF 591 ST 1/2 thru 1 1/4 (6.4) 1-1/4 thru 4 3/8 (9.5) VF 591 V-PORT 1/2 thru 2 1/4 (6.4) Technical Bulletin Document No. 155-208P25 March 7, 2005 Page 2 Siemens Industry, Inc. Installation Conventions WARNING Personal injury/loss of life may occur if you do nor performprocedure specified. CAUTION Equipment damage, or loss of data may occur if you do not perform a procedure as specified. Packing Applications The packing on a Flowrite Valve provides a "seal” around the valve stem to prevent loss of the controlled medium (that is, steam, water, ethylene glycol solutions, etc.) while allowing the valve stem to pass through the packing for functional opening and closing of the valve. Table 2. Valve Packing Application. Type of Packing Temperature Range Maximum Pressure Saturated Steam Water EP V-Ring Packing (Spring Loaded) 25 to 300°F (-4 to 149°C) 50 psig (345 kPa) Valve Body Rating Teflon V-Ring Packing (Spring Loaded) 25 to 350°F (-4 to 177°C) *125 psig (862 kPa) Valve Body Rating Split Teflon ® Ring Packing 40 to 366°F (4 to 198°C) *150 psig (1034 kPa) Valve Body Rating Solid Teflon Ring Packing 40 to 366°F (4 to 198°C) *150 psig (1034 kPa) Valve Body Rating *or Valve Body Rating if it is lower. V-Ring Packing for Flowrite Valves Table 3 provides a listing of the spring-loaded V-ring packing kits, valve stem diameters, and the packing materials. Table 3. V-Ring Packing Kits. Packing Kit Number Valve Stem Diameter at Packing Packing Material 591-501 1/4-inch (6.4 mm) EP V-ring 591-502 3/8-Inch (9.5 mm) 592-007 1/4-inch (6.4 mm) Teflon (2) and EP (1) V-Ring 592-008 3/8-inch (9.5 mm) Selecting the Appropriate V-Ring Packing Kit Choose the proper V-ring packing kit from Table 3. When a kit has two packing gland assemblies or two gland spacers, See Tables 4 and 5 and Figures 1 and 2. Select the packing gland assembly (item 1, Figure 5), gland spacer (item 2, Figure 5), and washer (item 3, Figure 5) for the valve size and type being serviced. VF591SD and VF591ST valves, 1/2-inch (13 mm) through 2-inch (51 mm) sizes, use the stem bearing (item 7, Figure 5) included in each kit. VF591ST valves 1-1/2-inch (13 mm) and two-inch (51 mm) sizes normally closed, use the O-ring (item 11, Figure 4) included in kits 591-502 and 592-008. The eight-inch actuators use the set screw (item 8, Figure 5) and the copper slug (item 9, Figure 5) included in each kit. Packing for Flowrite Valves Technical Bulletin Document No. 155-208P25 March 7, 2005 Siemens Industry, Inc. Page 3 V-Ring Packing for Flowrite Valves, continued Description Dimensions Inches (mm) Part Number X Y Z Packing gland assembly, type A 7/8 (22) 1 (25) 1/4 (6.4) 590-763 Packing gland assembly, type B 15/16 (24) 15/16 (24) 3/8 (9-5) 591-783 Packing gland assembly, type C 1-1/8 (29) 1-1/4 (32) 3/8 (9-5) 590-767 Figure 1. Packing Gland Assembly. Description Dimensions Inches (mm) Part Number T U V Gland spacer, type D 3/32 (2.4) 1 (25) 3/4 (19) 591-922A Gland spacer, type E 1/8 (3.2) 1 (25) 3/4 (19) 591-922 Gland spacer, type F 3/32 (2.4) 1 (25) 7/8 (22) 591-926 Washer, type G 3/32 (2.4) 5/8 (16) 9/32 (7.1) 591-919 Washer, type H 3/32 (2.4) 3/4 (19) 13/32 (10) 591-923 Figure 2. Gland Spacer or Washer. Table 4. Packing Kit-Multiple Part Selection (See Note). Valve Size In Inches Valve Type Packing Gland Gland Spacer Washer 1/2- 2 VF591CD A D G 1/2 - 2 VF591WM A D G 1/2 - 2 VF591 V--PORT A D G 3/4 - 1 VF591SD A E G 3/4 - 1 VF591ST A E G 1 - 4 VF591DS A D G 1-1/4 - 2 VF591SD B F H 1-1/4 - 2 VF591ST B F H 2-1/2 - 6 VF591CD C F H 2-1/2 - 6 VF591WM C F H 5-8 VF591 DS C F H NOTE: Letter designations are defined in Figures 1 and 2. Technical Bulletin Document No. 155-208P25 March 7, 2005 Page 4 Siemens Industry, Inc. V-Ring Packing for Flowrite Valves, continued WARNING : Isolate the valve so medium (water, steam, etc.) will not leak out of the valve body when it is disassembled. Repacking Procedure See Figure 5 for the location of the parts used in this procedure unless otherwise indicated. 1. Remove and cap air line to valve actuator. 2. Remove actuator and disassemble valve body. 3. Check the stem. It must have a polished surface that is free from roughness or pitting. Replace the stem if necessary. 4. Remove the old packing and clean packing chamber. Be sure it is free of dirt and grease. 5. On valves with a removable stem bearing (item 7), examine it and replace if damaged. If replaced use epoxy type adhesive (not provided) to hold the new bearing in place. 6. Slide the stem assembly into the bonnet. 7. The packing parts must be installed in the exact order shown in Figure 5. Place split ring (item 6), washer (item 3), and spring (item 5) over the stem and gently push each piece into the packing chamber. 8. Remove the tie wrap holding the V-ring packing set (item 4) together and lightly lubricate each V-ring with the silicone lubricant provided in the packing kit. CAUTION: Cover the threads on the stem with a thread protector or thick coat of silicone grease so the V-rings will not be damaged. Even a small cut can prevent the rings from sealing against the stem. 9. Starting with the small hard ring, slide the rings over the stem in the order shown in Figure 3. Carefully push each ring into the packing chamber. 10. Place gland spacer (item 2) on top of bonnet. 11. Thread the packing gland assembly (item 1) into the bonnet. Finger tighten the gland assembly against the spacer. Do not pack bonnet packing chamber with grease. 12. On valves with an O-ring seal located on the bottom guide (item 11, Figure 4), remove the old seal and replace it with a new one. 13. Reassemble the valve body and attach the actuator to it (item 8). 14. Connect the air line to the actuator. The repacking procedure is now complete. Packing for Flowrite Valves Technical Bulletin Document No. 155-208P25 March 7, 2005 Siemens Industry, Inc. Page 5 V-Ring Packing for Flowrite Valves, continued Figure 3. V-ring, Packing Set. Figure 4. Valve Cap. Figure 5. V-ring Packing Assembly. Table 5. Packing Kit Parts List (See Figures 4, 5 and Notes). Item Description 591-501 592-007 591-502 592-008 1 Packing gland assembly A A B B 1 Packing gland assembly • • C C 2 Gland spacer D D F F 2 Gland spacer E E • • 3 Washer G G H H 4 V-ring packing set x x x x 5 Spring x x x x 6 Split ring Packing x x x x 7 Stem Bearing x x x x 8 Set screw x x x x 9 Copper slug x x x x 10 Stem nuts (3 or 4) x x x x 11 O-ring • • x x NOTES : 1. An (X) indicates the part is in the kit. 2. Letter designations are defined in Figures 1 and 2. 3. See Table 4 for the packing gland assembly, gland spacer, and washer for each valve type and size. 4. Valve bonnets manufactured before March 1988 have 1/8 NPT hole and pipe plug. Technical Bulletin Document No. 155-208P25 March 7, 2005 Page 6 Siemens Industry, Inc. Split Ring Packing for Flowrite Valves The split ring packing is made of Teflon-impregnated fiber to provide low friction and a degree of self-lubrication. This type of packing can be utilized for hot and cold water, steam, and ethylene glycol solutions. Split ring packing kits and parts are shown in Tables 6 and 7. Valve lubricators and lubricants are recommended to prolong packing life and improve sealing of the controlled medium. See Table 8 for lubricant. Table 6. VF591CD, DS, WM, V-Port Flowrite Valves. See Figure 6. Item Description 1/4-inch (6.4 mm) Diameter Stem at Packing 3/8-inch (9.5 mm) Diameter Stem at Packing 1 Split ring packing kit (200 pieces) 590-088 590-089 2 Packing gland assembly 590-763 590-767 3 Packing spacer 590-766 590-770 Table 7. VF591SD and ST Flowrite Valves. See Figure 6. Item Description 1/4-inch (6.4 mm) Diameter Stem at Packing 3/8-inch (9.5 mm) Diameter Stem at Packing 1 Split ring packing kit (200 pieces) 590-088 590-089 2 Packing gland assembly 590-763 591-783 3 Packing spacer 591-798 591-799 4 Stem bearing 591-796 591-797 Table 8. Lubrication for Flowrite Valves w/ Split Ring Packing. Description Lubricant Part Number Tube of Lubricant 5.3 oz, Dow Corning Number 111 silicone. Use below 300°F (149°C). 590-165A Stem packing lubricator with Dow Corning Number 111 silicone. Use below 300°F (149°C) 590-184A Tube of lubricant 1.1 oz, Dow Corning Number 111 silicone. Use below 300°F (149°C) 591-946 Packing for Flowrite Valves Technical Bulletin Document No. 155-208P25 March 7, 2005 Siemens Industry, Inc. Page 7 Split Ring Packing for Flowrite Valves, continued Figure 6. Split Ring Packing Assembly. Partial Repacking The top three packing rings can be replaced without disassembling the valve to minimize servicing time for critical system operation. However, replacement of all four packing rings is recommended to obtain optimum packing performance and life. CAUTION: Do not use a wrench on the packing gland nut or valve stem. Do not scratch polished surface of stem with pick. Figure 7. Split Ring Packing Removal. 1. Loosen packing gland nut. 2. Remove the three packing rings from above the lubricator spacer with a pointed rod or pick (Figure 7). 3. Coat new packing rings with recommended lubricant. 4. Slip rings around stem, staggering cuts, push down as far as possible and tighten packing gland nut sufficiently to compress the packing rings toward the bottom of the packing gland. 5. Loosen packing gland nut and readjust to "finger tight" only. 6. Pack bonnet with recommended lubricant. NOTE: Single seat 2-way screwed valves should be repacked in the closed position. The partial repacking procedure is now complete. Technical Bulletin Document No. 155-208P25 March 7, 2005 Page 8 Siemens Industry, Inc. Split Ring Packing for Flowrite Valves, continued Complete Repacking Disassembly See Figure 6 for the location of the parts used in this procedure. 1. Disassemble the actuator from valve body assembly. 2. Remove the nuts from the valve stem. 3. Remove the packing gland nut from the bonnet, then disassemble the bonnet from the valve body. If the stem remains with the bonnet, on a normally open valve only, slide the stem out of the bonnet. 4. Examine the stem, replace if damaged. 5. Remove the top three packing rings, the packing spacer, and the lower packing ring with a pointed rod or a pick (Figure 7). 6. If a stem bearing is provided, examine it and replace if damaged. 7. Clean packing chamber so it is free of dirt and grease. Reassembly 1. Slide the bonnet over the stem and screw the bonnet into the valve body. 2. If used, slide the stem bearing over the stem and into the bonnet, make sure it is properly nested in the pocket of the bottom of the bonnet. Use an epoxy type adhesive (not provided) to hold the bearing in place. 3. With the valve stem held in the closed position, carefully place a packing ring, the packing spacer and the remaining three packing rings over the stem in the order shown in Figure 6. Individually tamp each packing ring into the bonnet as far as possible. The splits in the packing rings must be staggered to provide a good seal. 4. Holding the stem in the closed position, tighten the packing gland nut sufficiently to fully compress the packing rings into the bonnet. Loosen the packing gland nut and readjust to "finger tight" only. 5. Pack bonnet with recommended lubricant. Use about 0.5 ounces of lubricant per valve. 6. Reassemble actuator to valve body. The complete repacking procedure is now complete. Packing for Flowrite Valves Technical Bulletin Document No. 155-208P25 March 7, 2005 Siemens Industry, Inc. Page 9 Solid Ring Packing for Flowrite Valves Repacking Procedure This packing uses solid Teflon packing rings and a lubricant. It is intended for high pressure steam but can be used in any application where packing leakage has been a problem. The lubricant prolongs packing life, improves the seal, and allows easier stem movement. The packing rings, lubricants, etc. are shown in Table 9. Since the packing rings are not split, the valve must be disassembled to install them. See Figure 8 for the location of the parts used in this procedure. Figure 8. Solid Ring Packing Assembly. See Table 9. Table 9. Solid Ring Packing Parts. See Figure 8. Item Description (See Note) 1/4-Inch (6.4 mm) Stem at Packing 1/4-Inch (6.4 mm) Stem at Packing 1 White Teflon packing ring (2 required) 590-771 590-773 2 Black Teflon packing ring (3 required) 590-772 590-774 3 Packing spacer See Table 6, 7 See Table 6, 7 4 Packing gland assembly See Table 6, 7 See Table 6, 7 5 Stem bearing See Table 6, 7 See Table 6, 7 Lubricant (Molycote G) 2.8 oz. Tube Use above 300°F (149°C) 590-164 590-164 Technical Bulletin Document No. 155-208P25 March 7, 2005 Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Flowrite is a registered trademark of Siemens Industry, Inc. Product or company names mentioned herein may be the trademarks of their respective owners. © 2005 Siemens Industry, Inc. Siemens Industry, Inc. Building Technologies Division 1000 Deerfield Parkway Buffalo Grove, IL 60089 + 1 847-215-1000 Your feedback is important to us. If you have comments about this document, please send them to sbt_technical.editor.us.sbt@siemens.com Document No. 155-208P25 Printed in the USA Page 10 Solid Ring Packing for Flowrite Valves, continued Disassembly 1. Disassemble the actuator from the valve body assembly. 2. Remove the nuts from the valve stem. 3. Remove the packing gland nut from the bonnet, then disassemble the bonnet from the valve body. If the stem stays with the bonnet, on normally opened valves only, slide the stem out of the bonnet. 4. Examine the stem, replace if damaged. 5. Remove the old packing with a pointed rod or a pick. Clean the packing chamber so it is free of dirt and grease. Reassembly 1. Slide the bonnet over the stem, and screw the bonnet into the valve body. 2. If used, slide the stem bearing over the stem and into the bonnet. Make sure it is properly nested in the pocket of the bonnet. Use an epoxy type adhesive (not provided) to hold the bearing in place. 3. With the valve stem held in the closed position, carefully place one white ring, one black ring, the packing spacer, two black rings, and one white ring over the stem in the order shown in Figure 8. Individually tamp each packing ring into the bonnet as far as possible. 4. Holding the stem in the closed position, tighten the packing gland nut sufficiently to fully compress the packing rings into the bonnet. Loosen the packing gland nut and readjust to "finger tight" only. 5. Pack bonnet with recommended lubricant. Use about 0.5 ounces of lubricant per valve. 6. Reassemble actuator to valve body. The repacking procedure is now complete. Next >