3/2 Double Valves with Dynamic Monitoring & Dynamic Memory Kupplung/Bremse クラッチ/ブレーキ Iaktk@ xfrjks/kd Embreagem/Freio 离合器/制动器 • Manufacturers of Premium Pneumatic Controls since 1921 •

Table of Contents DM2® Series D Double Valves General Information Ordering Information Valve Dimensions Overview of DM2® Series D Double Valve Flow Information Operating Instructions Repair Kits The Leader in Double Valve Design ROSS has long been in the forefront of double valve research and development. For over 60 years ROSS has been responding to the needs of press manufacturers and users by progressively improving double valve technology. Internal flow patterns of double valves developed by ROSS have included series flow, parallel flow, combined series-parallel tandem flow, and combined...

DM2® Series D Double Valves The ROSS DM2® Series D double valves provide significant features in response to the changing demands of the mechanical press industry and its associated standards and regulations regarding the control of pneumatically controlled clutch and brake applications. The consensus requirements of the regulations and good practices require that, in case of a failure within the valve, the clutch and brake mechanisms be quickly exhausted, a monitor takes action to prevent further operation, and a method to alert personnel is incorporated. These features also make the valve suitable...

Double Valves with Total Dynamic Monitoring & Complete Memory Self Monitored - Clutch/Brake Control For Size 2 Certifications Approval Pending Simplified Schematic Valve Sizes: DM2® Series D double valves are available in 5 sizes, providing a broad range of flow capabilities to meet your needs. For convenience, valves are designated by the nominal sizes 2, 4, 8, 12, and 30 with outlet ports ranging from 1/4” to 2”. • Dynamic Monitoring With Complete Memory: Memory, monitoring, and air flow control functions are simply integrated into two identical valve elements. Valves lock-out due to asynchronous...

DM2® Series D Double Valves HOW TO ORDER (Choose your options (in red) to configure your valve model number.) REVISION LEVEL Valve Weight: Valve and base assembly with status indicator and solenoid reset. Size 2: 5.0 lb (2.3 kg). Size 4: 6.0 lb (2.8 kg). Size 8: 9.1 lb (4.2 kg). Size 12: 15.5 lb (7.1 kg). Size 30: 32.6 lb (14.8 kg). ** 220 VAC not available in the U.S. (OSHA regulations limit press control voltage to no more than 120 volts AC). BASE MODEL NUMBERS and BASE SPECIFIC INFORMATION Valve Port Size Base Status Weight Size Inlet Outlet Model Number* Indicator lb (kg) 2 1/4 1/4 1872C91...

DM2® Series D Double Valves With Status Solenoid Reset With Status (Base mounting hole pattern) ! Valve envelope (Based in overall hole dimnsions at left.) with Solenoid Reset Pressure Switch (Base mounting hole pattern) Valve envelope (Based in overall hole dimnsions at left) Pressure Switch (Base mounting hole pattern) i(Based in overall hole dimnsions at left.) © 2010, ROSS CONTROLS. All Rights Reserved.

DM2® Series D Double Valves (Base mounting hole pattern) Valve envelope in overall hole dimnsions at left.) with Pressure with Pressure (Base mounting hole pattern) Valve envelope (Based in overall hole dimnsions at left) STANDARD SPECIFICATIONS: For DM2® Series D double valves. Pilot Solenoids: According to VDE 0580. Enclosure rating according to DIN 40050, IEC 60529 IP65. Two solenoids, rated for continuous duty (additional solenoid on optional reset). Standard Voltages: 110 volts, 50/60 Hz; 220** volts, 50/60 Hz; 24 volts DC. For other voltages, consult ROSS. ** 220 volts AC not available...

Overview of DM2® Series D Double Valve Function Valve de-actuated: The flow of inlet air pressure into the crossover passages is restricted by the size of the passage between the stem and the valve body opening. Flow is sufficient to quickly pressurize pilot supply/timing chambers A and B. The inlet poppets prevent air flow from crossover passages into the outlet chamber. Air pressure acting on the inlet poppets and return pistons securely hold the valve elements in the closed position. (Air passages shown out of position and reset adapter omitted for clarity.) EXHAUST T EXHAUST OUTLET OUTLET...

Overview of DM2® Series D Double Valve MAIN VALVE INTERNALS Exhaust chamber Exhaust poppet Crossover passages Inlet chamber Spring stop Return spring VALVE SCHEMATIC Pilot supply/timing chamber A Outlet chamber Inlet poppet Timing orifice Flow restrictor Reset poppet Reset piston Optional Status Indicator Reset port T\ Optional reset solenoid valve

Valve Response Charts The charts below represent the fill and exhaust times for each of the various sizes of DM2® Series D double valves. The "fill" times were measured while raising (filling) the pressure in a volume from 0 to 30, 60, & 80 psi (0 to 2.1, 4.1, & 5.5 bar) with a 90 psi (6.2 bar) inlet pressure. Conversely, the "exhaust" times were measured while lowering the pressure (exhausting) in a volume from 90 psi (6.2 bar) down to 90 to 60, 30, & 9 psi (4.1, 2.1, & 0.6 bar). Exhausting tests performed with silencer installed. Volume litres (cubic inches) Volume litres (cubic inches) ©2010,...

Valve Response Charts Volume litres (cubic inches) Volume litres (cubic inches) Application & Safety Category The design features of the DM2® Series D are of considerable importance to users of double valves, such as on mechanical power press applications and other critical applications. This is because the DM2® Series D is designed to meet the latest standards requiring "control reliable", "Category-3 & -4", or "dynamic monitoring" capability. Both the monitoring and memory capabilities of the DM2® Series D valve are built in to the two piston-poppet stem assemblies. During normal operation,...

Operating Instructions Start-up Before start-up, the installation must be checked thoroughly by persons trained and experienced in the operation of pneumatic equipment. Make sure that specifications given on the valve label (e.g. “max. operating pressure” and “electrical characteristics”) will be in accordance with the operating specifications of the press. When operating pressure is initially applied, it may be necessary to actuate the reset valve momentarily to move the main valve into the ready-to-run condition. Make sure that the inlet supply and the exhaust path are not restricted. Operating...