VN Two-Way Threaded Globe Valve FEATURES PRODUCT DATA Red brass body with NPT-threaded end connections. Low seat leakage rate (. percent of C v ). : rangeability per VDI/VDE 7. Spring-loaded, self-adjusting packing. Accurate positioning to ensure state of the art temperature control. Directly coupled electric and pneumatic actuators for easy mounting. Sizes range from / in. to in. Valve designs provide equal percentage flow characteristic for water and linear flow characteristic for steam. Stainless steel stem and metal-to-metal seats. Repack and rebuild kits for field servicing. APPLICATION The VN is a two-way threaded globe valve that controls steam, water, and glycol solutions (up to percent concentration) in heating or cooling HVAC applications. The valve is used in two-position and modulating control systems. The valve is not suitable for combustible gas service. Contents Application... Features... Specifications... Ordering Information... Installation... Checkout... 7 6--
VN TWO-WAY THREADED GLOBE VALVE SPECIFICATIONS IMPORTANT The specifications given in this publication do not include normal manufacturing tolerances. Therefore, an individual unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions and some minor differences in performance can be expected if those conditions are changed. Models: VN Valve: Two-way threaded globe valve for steam, water, or glycol. NPT-threaded pipe connections. Throttling plug provides equal percentage flow characteristic for water (VNxxx, VNxxx), linear flow characteristic for steam (VNxxx). NOTE: VNxxx and VNxxx are direct acting (stem down to close). VNxxx is reverse acting (stem up to close). Dimensions: See Fig.. Valve Sizes and Flow Capacities: See Table. Pipe Connections: Internal NPT-threaded connections. Seat: Stainless steel, replaceable (except VNxxx / in. to -/ in. which have an integral brass seat). ANSI Body Class: psi. Stem: Stainless steel. Plug: Brass on VNxxx and VNxxx for water; stainless steel on VNxxx for steam. Stroke: / in. ( mm). Approximate Leakage Rate:. percent C v. Pattern: -way, straight-through. Body Material: Red brass. Packing: Spring-loaded, carbon fiber reinforced PTFE V- rings. Rangeability: : per VDI/VDE 7. Pressure-Temperature Ratings: Water: 6 F to F, 7 psi ( bar). F to 7 F, psi (. bar). Maximum Water Differential Pressure: psid (. bar). Steam: psi (6.9 bar) at 7 F (VNxxx). Maximum Differential for Quiet Water Service: psid. Valve Flow Characteristics: Water: Equal percentage (VNxxx, VNxxx). Steam: Linear (VNxxx). See Fig.. Close-Off Pressure Ratings: See Fig., and Table. Valve Design Life:, full cycles at maximum rated temperature. Replacement Parts: See Fig. and Table. Motor and Linkage Selection: Electric Pneumatic ML6/ML6 MP9C ( and in.) ML7/ML7 MP9E ( and in.) ML79/ML69 Modutrol IV with Q Damper DCA with Q Table. Valve Size and Flow Capacities. Size (in.) Capacity (C v ) /.7.6..9.7 / 7..7 -/.7 -/ 9. 6. ORDERING INFORMATION When purchasing replacement and modernization products from your TRADELINE wholesaler or distributor, refer to the TRADELINE Catalog or price sheets for complete ordering number. If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:. Your local Honeywell Environmental and Combustion Controls Sales Office (check white pages of your phone directory).. Honeywell Customer Care 9 Douglas Drive North Golden Valley, Minnesota -6. http://customer.honeywell.com or http://customer.honeywell.ca International Sales and Service Offices in all principal cities of the world. Manufacturing in Belgium, Canada, China, Czech Republic, Germany, Hungary, Italy, Mexico, Netherlands, United Kingdom, and United States. 6-
VN TWO-WAY THREADED GLOBE VALVE Y, B Y Y PERCENTAGE STEM TRAVEL 9 7 6 FLOW CHARACTERISTICS EQUAL PERCENTAGE LINEAR 6 7 9 PERCENTAGE FLOW M97 A Fig.. Equal percentage and linear flow characteristics. VALVE SIZE (IN) / / -/ -/ A in. (mm) -/ () B in. (mm) -9/6 () -/6 -/6 (6) -/ -/6 (7) -/ () VALVE Y in. (mm) Y a in. (mm) VNXXX OR -/ (9) -/ () VNXXX STEM FULLY DOWN a Y WITH STEM EXTENSION FOR MP9C,E ( IN. ONLY) VNXXX -/6 (7) -/6 () STEM FULLY UP Fig.. VN body dimensions in in. (mm). M77A -7 - - (-) (-7) (-9) () 9 (6) (69) (6) () 6 7 (7) () 9 () () () 6 7 (7) () 9 () () 6 7 (7) () 9 () () () VN / THROUGH IN., DIRECT ACTING, THREADED BODIES WITH IN. DIA. PNEUMATIC ACTUATOR (NORMALLY OPEN) (76) 6 () () (699) VNXXX VNXXX CLOSE OFF PRESSURE RATINGS PSI (kpa) USE - PSI SPRING FOR POSITIONER MODEL (MP9E). C V 6. C V 9. C V.7 Fig.. Close-off ratings at various control air pressures for VN Valves and MP9 Pneumatic Actuators. (7) C V.7 (96) 6 C V 7. () C V.7 TO.9 (79) (7) (9) M69 6-
VN TWO-WAY THREADED GLOBE VALVE -7 - - (-) (-7) (-9) 7 () () 9 (6) (69) (6) () 6 7 (7) () 9 () () (7) () 6 7 (7) () 9 () () () 6 7 (7) () 9 () () () VN / THROUGH IN., DIRECT ACTING, THREADED BODIES WITH IN. DIA. PNEUMATIC ACTUATOR (NORMALLY OPEN) (76) 6 () C V 6. () (699) (7) (96) 6 () VNXXX VNXXX CLOSE OFF PRESSURE RATINGS PSI (kpa) USE - PSI SPRING FOR POSITIONER MODEL (MP9E). CV 9. C V.7 C V.7 TO.9 C V 7. C V.7 (79) (7) (9) M6 - (-7) -7 (-) () () - (-9) () 7 () 6 () () () 6 7 9 (7) () () (7) () () () () (6)(69) (76) () (9) (96)()() 6 CLOSEOFF PRESSURE RATINGS PSI (kpa) USE - PSI SPRING FOR POSITIONER MODEL (MP9E). VN / THROUGH IN. DIRECT ACTING THREADED BODIES WITH 7-/ REVERSE ACTING PNEUMATIC ACTUATOR (NORMALLY CLOSED) C V 6. C V 9. C V.7 C V.7 TO.9 C V 7. C V.7 M6 SPRING RANGE PS (kpa) - - (-7) (-) () () 7 () 6 () () VN / THROUGH -/ IN. REVERSE ACTING THREADED BODIES WITH IN. DIRECT ACTING PNEUMATIC ACTUATOR (NORMALLY CLOSED) () () (7) () () (7) () () (7) CLOSEOFF PRESSURE RATINGS PSI (kpa) USE - PSI SPRING FOR POSITIONER MODEL (MP9E). Fig.. Close-off ratings at various control air pressures for VN Valves and MP9 Pneumatic Actuators. (continued) C V.7 () C V.7 () C V.7 TO.9 C V 7. 6 () 6 () 7 () M6 6-
VN TWO-WAY THREADED GLOBE VALVE -7 - - (-) (-7) (-9) 7 () (7) () () 9 (6) (7) (7) () (9) () (9) () 6 7 () (9) () 6 7 () () VN / THROUGH -/ IN. REVERSE ACTING THREADED BODIES WITH 7 IN. REVERSE ACTING PNEUMATIC ACTUATOR (NORMALLY OPEN) (7) () () (7) () () (7) CLOSEOFF PRESSURE RATINGS PSI (kpa) () C V 7. () C V.7 TO.9 C V.7 6 () C V.7 6 () 7 () USE - PSI SPRING FOR POSITIONER MODEL (MP9E). M6 - - (-7) (-) () () 7 () 6 () () () () (7) VN / THROUGH -/ IN. REVERSE ACTING THREADED BODIES WITH IN. DIRECT ACTING PNEUMATIC ACTUATOR (NORMALLY CLOSED) () () (7) () Fig.. Close-off ratings at various control air pressures for VN Valves and MP9 Pneumatic Actuators. (continued) () (7) CLOSEOFF PRESSURE RATINGS PSI (kpa) USE - PSI SPRING FOR POSITIONER MODEL (MP9E). () () CV.7 TO.9 6 () CV 7. CV.7 CV.7 6 () 7 () M6 INSTALLATION When Installing This Product. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.. Installer must be a trained, experienced service technician.. After installation is complete, check out product operation as provided in these instructions. IMPORTANT. Do not lift the valve by holding the stem.. Do not mount the valve with the stem pointed lower than horizontal.. Mount the valve with the flow arrow pointed in the direction of flow through the valve.. Mount the valve between aligned pipes. Mounting the valve on pipes that are not aligned causes leakage at the valve-to-pipe connection.. Ensure complete engagement on pipe to valve body threads. 6. Hold the valve body with a clamp or pipe wrench on the hexagonal fitting nearest the pipe to prevent damage to the valve body while mounting on the pipe. Refer to Fig.. 7. Be sure to allow enough room for installation and service. Clearance for valve installation is dependent on actuator size and the valve pipe size. Location Select a location where the valve, linkage, and actuator are within the appropriate pressure and temperature ratings. Leave sufficient clearance above the valve to accommodate actuator installation and allow room for servicing the valve body. (Completely install the valve body in the pipe line before installing the actuator and linkage.) When selecting a location for the valve, consider actuator mounting restrictions. Modutrol IV Motor crankshafts must be mounted horizontally. 6-
VN TWO-WAY THREADED GLOBE VALVE Mounting The preferred valve mounting position is with the stem vertical. For steam applications, mount with the stem at a degree angle. Do not mount the valve with the stem more than 9 degrees from the vertical (pointing lower than horizontal). Scale and foreign material can collect, scoring the stem and causing packing leakage. Protect the stem from damage due to bending or scratching. IMPORTANT. Before installing linkage and actuator, make sure that the valve stem operates freely. Impaired stem operation can indicate that the body was twisted or the stem was bent. Either of these conditions can require valve replacement.. Align pipes squarely with valve at each end connection. NOTE:. If the pipes are forced into the valve, the body can become twisted and improper seating can result.. Apply pipe dope sparingly.. Be careful to prevent pipe debris, such as chips and scale, from entering the piping because this material can lodge in the seat and prevent proper closing. Threading on threaded bodies conform to NPT. Refer to the table in Fig. for valve pipe sizes and thread lengths. Fig. also shows two effective methods of holding the valve and pipe when attaching it. Refer to installation information furnished with the linkage and motor when installing these controls. Table. Close-off Ratings (psid) for VN Valves with Electric/Electronic Actuators. Mod IV Motor with Q Linkages ML6A, ML7A Valve Size (NPT) lb 6 lb lb lb lb 6 lb VNxxx and VNxxx Valves / a a a a a Pressure is limited by fluid temperature. See valve temperature/pressure ratings. ML6, ML7 ML6, ML7 / a a 96 9 a 6 96 -/ a 6 7 a 6 -/ 7 6 67 9 6 9 6 7 6 VNxxx Valves /, / a a a a a a 9 a -/ a a 7 -/ a 6 a 67 9 6 9 a 7 6 ML79, ML67 PIPE SIZE (IN.) / / -/ -/ EFFECTIVE LENGTH OF THREADS IN IN. (MM) / 9/6 /6 /6 /6 / (.7) (.) (7.) (7.) (7.) (9.) USE PROPERLY REAMED AND CLEANED PIPE AND MODERATE AMOUNT OF DOPE (LEAVE TWO THREADS BARE). USE VISE GRIPS WITH THE HEX END NEXT TO THE PIPE (DO NOT TWIST OR SQUEEZE VALVE BODY). USE VISE TO HOLD PIPE SECURELY TO PREVENT TURNING. USE PARALLEL-JAW WRENCH TO GRIP VALVE HEX FLATS NEXT TO PIPE. M76A Fig.. Installing valves with threaded connections. 6-6
VN TWO-WAY THREADED GLOBE VALVE CHECKOUT Use the following procedure to check for proper valve operation:. Check valve body and connections for leaks. IMPORTANT Before installing linkage (if used) and actuator, make sure that the valve stem operates freely. Impaired stem operation can indicate that the body was twisted or the stem was bent. Either of these conditions can require valve replacement.. After installing linkage and actuator, check operation according to installation information furnished with these controls.. Operate system through one complete cycle to ensure valve controls properly.. Check valve at regular intervals for leakage around packing. NOTE: Packing is spring-loaded and should seldom require attention.. If leakage is discovered and inspection shows that the packing gland is screwed down tightly, then repack the valve. Table. Valve Rebuild and Repack Kits. Stem Diameter Stem Valve OS No. NPT Size (in.) Flow Capacity (C v ) (in.) Repack Kit Rebuild Kit Button VN /.7 / 976A 976A 96A a VN6.6 977A VN. 97A VN.9 979A VN.7 97A VN7 / 7. 97A VN6.7 97A VN7 -/.7 97A VN -/ 9. / 977A 97A VN99 6. 97A VN6 /.7 / 976A 9A VN.6 9A VN. 9A VN.9 9A VN.7 96A VN / 7. 97A VN6.7 9A VN7 -/.7 99A VN9 -/ 9. / 977A 9A VN97 6. 9A VN /.9 / 976A 979A VN.7 976A VN / 7. 976A VN.7 976A VN6 -/.7 976A a Each 96A contains stem buttons. NOTE: Seat removal tools are required to rebuild valves: 9- for / in. through -/ in. sizes. 9- for -/ in. through in. sizes. 7 6-
VN TWO-WAY THREADED GLOBE VALVE VN DIRECT ACTING TWO-WAY GLOBE VALVES VN REVERSE ACTING TWO-WAY GLOBE VALVES STEM BUTTON ASSEMBLY PACKING NUT STEM BUTTON ASSEMBLY PACKING NUT PACKING WAFERS PACKING WAFERS WASHER WASHER SPRING SPRING PACKING CARTRIDGE PACKING CARTRIDGE O RING O RING VALVE BODY VALVE BODY B A A AB B SEAT RING PLUG ASSEMBLY PLUG ASSEMBLY SEAT RING O RING O RING BOTTOM NUT LOWER SEAT PART INCLUDED IN REPACK KIT. 977A REPACK KIT (FOR VALVES WITH / INCH STEM) SHOWN. 976A REPACK KIT (FOR VALVES WITH / INCH STEM) CONTAINS THREE PACKING WAFERS INSTEAD OF FOUR. BOTTOM NUT INCLUDED IN REBUILD KIT. INCLUDED ONLY WITH VN REVERSE ACTING TWO-WAY GLOBE VALVES. Fig.. VN replacement parts. M7A By using this Honeywell literature, you agree that Honeywell will have no liability for any damages arising out of your use or modification to, the literature. You will defend and indemnify Honeywell, its affiliates and subsidiaries, from and against any liability, cost, or damages, including attorneys fees, arising out of, or resulting from, any modification to the literature by you. Automation and Control Solutions Honeywell International Inc. 9 Douglas Drive North Golden Valley, MN customer.honeywell.com U.S. Registered Trademark 6 Honeywell International Inc. 6- M.S. Rev. -6 Printed in United States