D-Pro Check Valves. SS316: 2000 psig (137 bar) Brass: 1500 psig (103 bar)

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1 Features DPro Check Valves V, VP, VA, VH6 and V6 Series VCH6 Series CNG check valves Fixed and Adjustable cracking pressure Pressures up to (6 ) and 6 ( ) Catalog No V6 March 9 Fixed and adjustable cracking pressure. Reliable DKOK Tube Fitting, NPT and ISO pipe end connections. Stainless and Brass material construction. Technical Information Valve Series V Series VA, VB, VC and VD VE and VF VP Series VA Series VH6 Series VAA and VPB VAA and VAB VH6A and VH6B VH6C Maximum Operating ( ) SS6 & Brass psi (6 ) SS6: ( ) Brass: ( ) SS6 & Brass psi (6 ) SS6 & Brass psi (6 ) SS6 6 psi ( ) SS6 psi ( ) Operating Temperature Ratings Cracking Pressure FKM Oring: 8 F to F ( 8 C to C) Oring: F to F ( C to C) Refer to spring table of each valve sereis Cracking, Reseal ( ) Cracking Pressure : Valve poppet is actuated when the pressure difference between the inlet and the outlet reaches the range of cracking pressure. Reseal Pressure : Valves that have higher cracking pressure can be resealed to bubbletight by the spring force. The reseal pressure is the pressure at the same flow direction, but lower than the cracking pressure. : Valves that have cracking pressure of (. ) and lower may not be able to return to the bubbletight seal. This may require back pressure to press the seal to form a bubbletight contact in addition to the spring force. Class Ratings Ratings are based on FKM Orings of SS6 valves and Orings of Brass valves Valve Series VA, VB, VC, VD, VAA, VAB, VPA, and VPB Series VE and VF Series SS6 VH6A, VH6B, and VH6C Series Temperature 8 to F (8 to 8 C) F (9 C) F ( C) F ( C) F (8 C) F (6 C) F (9 C) F ( C) SS6 ( 6) ( ) ( ) ( 68) ( 6) ( ) 8( ) Working Pressure, ( ) Brass SS6 Brass VH6A & VH6B VH6C ( 6) 6 ( 9) ( ) ( ) ( 8) 6 ( ) 6 ( ) ( 6) 9( ) ( 99) ( ) ( 89) ( 86) 6 ( ) 6 ( ) ( 6) 9 ( 8) 66 ( ) ( 8) ( ) 8( 9) ( ) 9 ( 9) 8 ( 88) 8 ( 8) 8 ( 6) ( 6) 6( ) 6( ) Operation When the valve is not actuated for a period of time, it may require a higher cracking pressure than the set cracking pressure. DPro check valves prevent reverse flow in circuits. Do not use them as relief valves. DPro check valves are designed to prevent loss of media caused by failed connections and for unidirectional flow control of fluids in chemical processing, power generation, oil and gas industries. Valve Cleaning and Factory Test V series Working pressure up to (6 ) Model Shown: V Series Check Valves VCD8TS VCF6NEP/S Every valve is cleaned, and packed in accordance with Dk Tech cleaning standard DC. Every valve is factory tested for cracking and reseals performance. THE POWER OF REIABIITY DK TECH CORPORATION

2 Check Valves DPro V Series Poppet Check Valves Feature: Working pressure up to (6 ). Body. Connector. Poppet. Oring*. Spring 6. Oring seal SS6 /A6, A9 FKM, optional EPDM, Kalrez. SS/A FKM, optional EPDM, Kalrez. *. Oring is secured in VE, VF series. Siliconbased ubricant for Poppet Molybdenum Dry Film ubricant for SS6 Body Threads Brass 6 /B6 SS/A V Series Ordering Information and Dimensions Basic Ordering Number DT MN FN VA DT D6M MDNT MN FN D6T VB DM M6N F6N D8T VC DM M8N F8N VD DT DT VE MN FN D6T VF M6N F6N Orifice Dimensions mm ( inch) Inlet Outlet mm ( in. ) hhex HHex l.6. ( /6).6 (.9). (.) 6. (.8) /8 in. Dkok /8 in. Male NPT /8 in. Female NPT / in. Dkok 6 mm Dkok / in. Male NPT / in. Dkok / in. Male NPT / in. Female NPT /8 in. Dkok mm Dkok /8 in. Male NPT /8 in. Female NPT / in. Dkok mm Dkok / in. Male NPT / in. Female NPT /8 in. Dkok / in. Dkok / in. Male NPT / in. Female NPT in. Dkok in. Male NPT in. Female NPT.8 (.9). (.8). (.9). (.) 6. (.6) 8. (.) ( /8) 9. ( /). ( ) 8.8 ( /8). ( /).9 ( /8).8 ( /8).9 ( 9/6)..9 ( 9/6).6 ( /6) 9.. ( ).. ( ) 8.8( /8) 8. ( /) All dimensions shown are for reference only and subject to change. Dimensions with DKOK are in fingertight position. 6. (.6) 6. (.). (.) 6.8 (.) 6. (.8). (.9) 6.8 (.) 8. (.6). (.9) 8. (.) 9.8 (.6). (.). (.). (.6). (.) 6. (.). (.9). (.98). (.98). (.) 6. (.) 8. (.89) 6. (.6) 68. (.69) Table. Spring Cracking, Reseal ( ) Spring Nominal Cracking Pressure Designator psi / Cracking Pressure Ranges Min. Pressure Max. Pressure Reseal Pressures Up to 6 Up to Up to Copyright 9. DK Tech Corporation. All rights reserved.

3 Check Valves DPro VP Series Piece Check Valves Features: Oring seal blowout proof design One piece body construction. Working pressure up to (6 ). Body. Poppet. Oring Holder. ocking Screw. Oring 6. Spring SS6 /A6, A9 FKM, optional EPDM, Kalrez SS/A Brass 6 /B6 SS/A Siliconbased ubricant on Poppet Molybdenum Dry Film ubricant on SS6 ocking Screw. VP Series Ordering Information and Dimensions Basic Ordering Number VPA VPB MN MR FN FR MFN FMN M8N F8N MF8N Inlet Outlet / in. Male NPT / in. ISO Male Tapered / in. Female NPT / in. ISO Female Tapered / in. Male NPT / in. Female NPT / in. Female NPT / in. Male NPT / in. Male NPT / in. Female NPT / in. Male NPT / in. Male NPT All dimensions shown are for reference only and subject to change... Dimensions mm ( inch) (.6) 6 (.) 6 (.) (.) 8 (.8) 8 (.8) 9 (.) (.8) Hex..8 ( 9/6) 9. ( /). ( ) 6.98 ( /6) Table. Spring Cracking, Reseal ( ) Spring Nominal Cracking Pressure Designator Psi / VA Series Adjustable Check Valves Cracking Pressure Ranges Min. Pressure Max. Pressure Up to 6 Up to Reseal Pressures.... Features Working pressure up to (6 ) Cracking pressure adjustable from to 6 (. to. ). Body. Poppet. Insert locking screw. Insert. Adjustable screw 6. ocking screw. Spring 8. Oring SS6 /A6, A9 FKM, optional EPDM, Kalrez SS/A Brass 6 / B6 Siliconbased ubricant on Poppet Molybdenum Dry Film ubricant on SS6 ocking Screw and Insert ocking Screw.

4 Check Valves VA Series Ordering Information and Dimensions Basic Ordering Number Table. Spring Cracking Pressure Range Desingntor Cracking Pressure C ( F) Bar Hex mm inch..98 /..6 9/6 to. to...6 9/6 to. to. to 6..6 / in. Male NPT. to 6 M8R6..6 / in. ISO Male Tappered All dimensions shown are for reference only and subject to change. Dimensions with DKOK are in fingertight position.. to.. to. FNVAA / in. Female NPT. MN / in. Male NPT MR / in. ISO Male Tappered M8N VAB Designator How to Order To complete ordering number, add adjustable spring designator to the basic ordering number and then specify valve material designator. Body material designators: S for SS6, B for Brass. Example: VAAFNS How to adjust cracking pressure Step Step Adjustable screw Adjustable screw ocking screw Allen key Move out the allen key up to the locking screw position.. To lock out the locking screw, turn the allen key clockwise. Features VH6 Series High Pressure Check Valves VCH6 Series CNG Check Valves. Gently slide the allen key up to adjustable screw position.. Adjust cracking pressure. lto increase cracking pressure, turn adjustable screw clockwise. lto decrease cracking pressure, turn adjustable screw counterclockwise. Sllghtly unscrew the locking screw counterclockwise. ocking screw ocking screw Step High pressure 6 ( ) Seal blowout proof design with the bonded seal on poppet. Models Shown: VH6BD8TS VH6CFNKZS. Body. Poppet with bonded seal H h SS6 /A9, A6. Connector. Poppet stop Spring Indicator ring* Oring Backup ring Poppet: SS6 /A9, A6 Bonded Seal: FKM, optional EPDM H standard for VCH6 series. SS /A SS6 /A6 FKM. H standard for VCH6 series. PTFE /D 9... Dkok Front, Back Ferrule and Nut SS6 /A9, A6 *Indicator ring bears the information of spring designator Table. Spring Cracking, Reseal Spring Nominal Cracking Pressure Ranges Cracking Pressure Min. Pressure Max. Pressure Designator Psi / Siliconbased ubricant on Poppet Molybdenum Dry Film ubricant on SS6 Connector threads ( Reseal Pressure. Up to 6. Up to. Up to.. ) ECE R Check valves Classification: Class Service Pressure: (9 ) Working Pressure: 6 ( ) Temperature: to C ( to F) VCH6 series CNG check valves VCH6 series high pressure check valve with CNG compatible H Oring are available for CNG application. : Dkok tube port 6 to mm OD (/ to in. OD) Pipe Thread / to in.

5 Optional Features Seal Materials Oring Seal Material FKM EPDM Kalrez* Check Valves VH6 Series Ordering Information and Dimensions M6R VH6A VCH6A VH6B VCH6B VH6C VCH6C Basic Ordering Number DT MN FR DT D6M FN MN MR D6T D8T D8M DM DM F6N F8N M6N M8N F8R M8R DT D6T DM DM FN F6N MN M6N FR F6R MR All dimensions shown are for reference only and subject to change. Dimensions with DKOK are in fingertight position. CNG valve ordering number: The basic ordering number listed in blue represents VCH6 as well as VH6 series check valves. Designator BN VT EP KZ /8 in. Dkok / in. Dkok 6 mm Dkok / in. Female NPT /8 in. Male NPT / in. Male NPT / in. ISO Female Tapered / in. ISO Male Tapered /8 in. Dkok / in. Dkok 8 mm Dkok mm Dkok mm Dkok /8 in. Female NPT / in. Female NPT /8 in. Male NPT / in. Male NPT / in. ISO Female Tapered / in. ISO Male Tapered / in. Dkok in. Dkok mm Dkok mm Dkok / in. Female NPT in. Female NPT /" Male NPT in. Male NPT / in. ISO Female Tapered in. ISO Female Tapered / in. ISO Male Tapered in. ISO Male Tapered Temperature Rating to ( to ) 8 to (8 to ) 9 to ( to ) to 99 ( to ) (.) 6. (.) 6. (.). (.). (.9). (.).9 (.8). (.) 69.9 (.). (.96) 68.6 (.). (.8). (.96) 6.8 (.). (.) 9.9 (.6) 69. (.) 8.6 (.9) 69. (.) 89. (.) 98.6 (.88) 88. (.8) 98.6 (.88) 8. (.) 9. (.8) 8.6 (.9) 9. (.6) 9. (.) 9. (.8) 8. (.) 9. (.6) 6. (.) 6. (.) 6. (.) FKM is standard for SS6 valves is standard for Brass valves *Kalrez: TM Dupont Dimensions mm ( inch) 6. (.) 6. (.) 6. (.). (.). (.). (.). (.). (.). (.). (.). (.). (.8). (.9). (.9). (.9) 8. (.) 9. (.8). (.9). (.8) 9. (.) 9. (.8). (.9). (.8) H /6 9/6 /6 6 9 /8 / h /6 /6 /6 /8 Pressure Rating ( ) 6 ( ) 6 ( ) ( ) How to Order Select valve basic ordering number, applicable seal, spring nominal cracking pressure, and body material. VADT VPBF8N VH6CD6T BN VT EP / S B S Seal Material Designator H: Nil for VCH6 CNG valves : Nil for Brass Valve FKM: Nil for SS6 Valve : BN FKM: VT EPDM: EP Kalrez: KZ Spring Nominal Cracking Pressure Designator /: / psi : psi : psi : psi : psi Note: Select the spring designator from Table,, and of each valve series. Valve Body Material Designator S: 6 stainless steel B: Brass

6 Spare Parts for Field Assembly Check Valves Spring Kit To order spring kit, prefix "9SPR",select check valve series and spring nominal cracking pressure designator. Examples; 9SPRVA/: / spring for VA series 9SPRVPB: spring for VPB series 9SPRVH6A: spring for VH6A series Seal Kit To order seal kit, prefix "CVO",select valve series and seal designator. Examples; CVOVABN: Oring for VA series CVOVPBVT: FKM Oring for VPB series. CVOVH6AVT: FKM bonded seal for VH6A series Note: Seal kit for VE/F series and VH6A/B/C series are supplied with the poppet. V6 Series ift Check Valves Features Working pressure up to 6 ( ) Temperature up to 9 F (8 C) Metal to metal seat Operation Operation of this valve heavily depends on gravity assistance. Thus mounting horizontally with bonnet nut upward to allow poppet to operate vertically. Reverse flow closes the valve, keeping poppet in the orifice. Forward flow opens the valve, lifting the poppet ift check valve is primarily for use in liquid systems. If a slight amount of leakage can be tolerated it can be used with heavy gases. Reverse flow less than.% of forward. Complete Ordering Number and Dimensions Complete Ordering Number V6A V6B V6C DTS D6MS FNS FNS SWTS D6TS FNS SW6TS SW8TS D8TS DTS F6NS F8NS SW8TS End Connection / in. DKOK 6 mm DKOK /8 in. Female NPT / in. Female NPT / in. tube socket weld /8 in. DKOK / in. Female NPT /8 in. Tube Socket Weld / in. Tube Socket Weld / in. DKOK / in. DKOK /8 in. Female NPT / in. Female NPT / in. Tube Socket Weld Orifice mm inch. 6.. Body Bonnet Nut Bonnet Poppet All dimensions shown are for reference only and subject to change. Dimensions with DKOK are in fingertight position Dimensions mm (in.) H H Hex 6. (.).8 (.) 6. (.8).9(.8). (.) 99.6 (.9) 9.(.) 9. (.). (.). (.8) 6. (.) 9.9 (.9). (.). (.6) / / Grade/ASTM Specification SS6/A6 or A9 SS6/A6 or A9 TYPE6/A6 SS6/A6 or A9 PressureTemperature Ratings ASME Class Material Group Material Name Tem p. F ( C) 6 to ( to ) (9) (8) () (6) 6 () () 8 (6) 9 (8). SS6 Working Pressure () 6 () 6 () 66 () 8 (9) 98 () 6 (9) 6 (8) 6 (8) 8 () How to order: Select complete ordering number. i.e., V6ADTS. Safe Valve Selection The selection of a valve for any application or system design must be considered to ensure safe performance. Valve function, valve rating, material compatibility, proper installation, operation and maintenance remain the sole responsibillty of the system designer and the user. Dk Tech accepts no liability for any improper selection, installation, operation or maintenance. THE POWER OF REIABIITY DK TECH CORPORATION DK TECH Trademarks Mailing Address 86, NaesamRi, JuchonMyeon, GimhaeCity, Gyeong Nam, Korea 68 DK TECH contact information Tel. (8) 8 Fax (8) 86 sales@dklok.com For Dkok International USA customers Tel. (8) 8/ Fax (8) dklok@dklok.com