The Viking Model VXD Double Interlock with Electric/Pneumatic Release Systems are now available as Pre-Trimmed Riser (PTR) systems. The PTR systems are pre-assembled and ready to install. These systems include the following common components needed for preaction systems (if applicable):
• Riser check valve
• Pneumatic actuator
• Release solenoid
• Water flow switch
• Air supervisoir switch
• Guages and valves
• Water supply control valve
• Fully assembled trim with drain manifolds and hoses