Engineering & Manufacturing Solutions Specifications: MDC rated for -4 gpm (-151 lpm) MDCF rated for -3 gpm (-114 lpm) Rate for 3 PSI (27 bar) Port Sizes #16 SAE (1-5/16-12) all ports Weighs 16 lbs. (7.3 kg) 2 Micron filtration recommended MDC Series Marine Grade 4-Way Directional Control Valve MDCF16TH34H MDC16TH44HB ISO 91:28 WITH DESIGN Certificate #2.2.1 42.344.4434 www.brand-hyd.com
Schematics & Features MDC SeriesMarine Grade / 4-Way Directional Control Valve MDCF16TH34H MDC16TH44HB MATERIALS: Cast Iron Body and End-Caps Buna N O Rings 416 Stainless Steel Heat-Treated Spool Components and Handle Adapter 316 Stainless steel Handle Amerlock 2 epoxy paint (2 coats) FEATURES: PRECISION GROUND STAINLESS STEEL SPOOL to assure long life (MDC & MDCF valves). SEALED ENDCAPS protects internal components from corrosive environments. BUILT-IN SPOOL DROP-CHECKS prevents loads from dropping through the transient position. O RING PORTS STANDARD to eliminate leakage. PAINTED after assembly to seal completed valve to minimize corrosion on exposed non stainless-steel components (salt spray tested per ASTM B-117). PILOT OPERATED RELIEF VALVE is standard on MDCF valves. FULL RANGE PRESSURE COMPENSATED by-pass type flow control valve (MDCF ONLY). MDCF REDUCES the number of fittings, plumbing and potential leaks in hydraulic circuits. FINE POSITIVE METERING in either direction with the manual handle (MDCF valve). D-44 MDC Series REV(D)
MDC & MDCF SERIES GENERAL INFORMATION: The Brand MDCF directional flow control valve combines the features of a four-way directional control valve, load-checks, a full range pressure compensated by-pass type flow control valve, and a pilot operated pressure relief valve all in one compact package. This valve reduces the number of fittings, plumbing and potential leakage points in hydraulic circuits. The manual rotary handle provides fine metering to either port. Flow to the work port is directly proportional to the movement of the lever. Flow out of each work port is constant regardless of load changes which allows the customer to maintain smooth and constant movement of a cylinder or motor. Every MDCF comes standard with a pilot operated relief. The tank port must be plumbed directly back to tank. The Brand MDC directional control valve does not have the flow control feature of the MDCF. The MDC can be used in series but the spool is difficult to shift when there is tank pressure. The MDC offers an optional high lift ball spring relief. The manual rotary handle provides metering to either port. General Information / Model Codes SPOOL TYPE Two spool types are available: closed center 4-way (DC only) and tandem metering 4-way (TM). HANDLE OPTIONS Rotary handle (H) is used to rotate spool in or out of valve body. Rotate clockwise to open P-A and B-T, and counter clockwise to open P-B and A-T (Note: A port is closest to the handle). The adjustable handle allows the center neutral position to be adjusted in 3 degree increments. SPOOL ATTACHMENTS Rotary friction detent (E) applies friction to the spool as it is rotated so that the spool does not rotate when the handle is released either side of neutral, a detent groove clearly indicates neutral position. MDC SERIES MODEL CODES AVAILABLE: MDC16TM44H...Four-way directional valve, #16 SAE port size, 4gpm (-151 lpm), tandem metering spool, rotary actuator, and work-port load checks. MDC16TM44HB.. Four-way directional valve, #16 SAE port size, 4gpm (-151 lpm), tandem metering spool, rotary actuator, 15psi high lift ball spring relief and work-port load checks. MDC16C44H...Four-way directional valve, #16 SAE port size, 4gpm (-151 lpm), closed center spool, rotary actuator, and work-port load checks. MDCF SERIES MODEL CODES AVAILABLE: MDCF16TM34H...Four-way directional flow control, #16 SAE port size, tandem metering spool, -3 gpm (-113 lpm) metering capability, four-way, rotary actuator, 15 psi adjustable relief. 42.344.4434 www.brand-hyd.com D-45
Options & Accessories MDC SeriesMarine Grade / 4-Way Directional Control Valve MDC & MDCF SERIES COMPLETE LIST OF OPTIONS AND ACCESSORIES: DC-K.... Seal kit for MDC. DC-KU..Seal kit for MDC with urethane polypac seal. DCF-K.. Seal kit for MDCF. DCF-KU... Seal kit for MDCF w/ Urethane POLYPAC Seal. DCF-CART-N....Pilot operated pressure relief valve for MDCF. TS-B..High lift ball spring relief for MDC. MDC-HA..Handle kit for MDC & MDCF. MDC-R.Rotary friction detent kit for MDC & MDCF. NOTE: Corrosion may occur in corrosive environments if the paint seal is broken while servicing the valve. Consider cleaning and repainting the affected areas to reduce further corrosion. D-46 MDC Series REV(D)
DC SERIES FLOW AND PRESSURE INFO: Pressure VS. Flow for Pilot Relief (MDCF) Flow And Pressure Information Pressure VS. Flow for B Relief (MDC) 42.344.4434 www.brand-hyd.com D-47
DC SERIES FLOW AND PRESSURE INFO: MDCFFLOW Flow VS. Pressure Drop MDCF VS PRESSURE DROP Q, FLOW [l/min] 38 57 76 19 95 114 TESTING CONDITIONS: ISO 32 HYDRAULIC OIL @ 122 F [5 C] SPOOL IN FULLY SHIFTED POSITION 1 8.3 6.9 8 5.5 6 4.1 4 2.8 2 1.4. 5 1 15 Q, FLOW [GPM] 2 25 3 P, PRESSURE DROP [bar] 12 P, PRESSURE DROP [PSI] Flow And Pressure Information MDC Series Marine Grade / 4-Way Directional Control Valve MDC Flow VS VS.PRESSURE Pressure Drop MDC FLOW DROP 38 57 Q, FLOW [l/min] 76 95 114 132 151 17 TESTING CONDITIONS: ISO 32 HYDRAULIC OIL @ 122 F [5 C] SPOOL IN FULLY SHIFTED POSITION 2 17.2 13.8 15 1.3 1 6.9 5 3.4. MDC Series REV(D) D-48 19 5 1 15 2 25 3 Q, FLOW [GPM] 35 4 45 P, PRESSURE DROP [bar] P, PRESSURE DROP [PSI] 25
Flow And Pressure Information DC SERIES FLOW AND PRESSURE INFO: MDCF VSFlow FLOW MDCFSPOOL Spool POSITION Position VS. Q, FLOW [GPM] 25. SPOOL POSITION [mm] 2.5 3.8 5. 1.3 TESTING CONDITIONS: ISO 32 HYDRAULIC OIL @ 122 F [5 C] 6.3 P>A @ 3PSI P 7.5 114 95 P>A @ 1PSI P 2. 76 15. 57 1. 38 5. A>T @ 3PSI P 19 A>T @ 1PSI P...5.1.15.2 SPOOL POSITION [IN] Q, FLOW [l/min] 3...25.3 MDC SpoolPOSITION Position VS. MDC SPOOL VSFlow FLOW Q, FLOW [GPM] 35. SPOOL POSITION [mm] 2.5 3.8 5. 1.3 6.3 TESTING CONDITIONS: ISO 32 HYDRAULIC OIL @ 122 F [5 C] 7.5 151 132 3. 113 25. 94 2. 15. 1. 76 P>A @ 3PSI P A>T @ 3PSI P 57 P>A @ 1PSI P 38 A>T @ 1PSI P 5... Q, FLOW [l/min] 4.. 19.5.1.15.2 SPOOL POSITION [IN].25.3 42.344.4434 www.brand-hyd.com D-49
Dimensional Data MDC SeriesMarine Grade / 4-Way Directional Control Valve DIMENSIONAL DATA: inches & [millimeters] D-5 MDC Series REV(D) 42.344.4434 www.brand-hyd.com