Combined Check Valve

Combined Check Valves or Hydraulic actuators weight loaded HAWL valves are used at all critical areas where the pipelines must be reliable, immediate and controlled quickly for valve closing, e.g. in case of external power losing, cutting off electricity cables during The earthquake, disasters In a system, ruptured pipelines, etc.) While for the valve closing is used a potential energy of lifted weight. The counterweight and lift cylinder shut-off valve is used to stop the water on the pipelines automatically. The pipeline shut-off function must be guarantee under hardest condition of maximum flow rate or pressure and in case of electric power failure. The movement of the shut-off device (butterfly, ball valve, needle valve) is guarantee by means an hydraulic actuator composed by hydraulic cylinder to maintain the valve open and a counterweight to close the valve.

Main Product Features

• Hydraulic actuator with weight, quickly and reliably close the valve, butterfly, ball, and control valve
• A modular concept, compact design and standard attachment by ISO 5211 allows assembly quick and easy on valve, HYDROMAT® system “plug and play”
• Specially bearing of lever with the weight is performed so inside the actuator housing that on two bearing seats only transmit torque and no additional burdens to valve shaft, provide a simple and easy assembly
• Actuator is standard equipped with its own hydro power unit for autonomous operations, or can be used as an external source of hydraulic fluid pressure from 70-250 bar
• Actuator with its own hydro-aggregate is used for opening and automatic keeping open the valve position Standardly is used very reliable compact electro-hydraulic power units type CEHPU design enables seamless functionality in a working environment temperature -40/+80 º Special request and design of hydro power pack (carbon steel, stainless steel…) or different pneumo-hydraulic combinations
• On request offered is an also special version of power units: pneumatic, pneumo-hydraulic, etc… (see a separate catalogue for the hydraulic power units)
• All versions of actuators are equipped with a hand pump in a case of emergency forcible valve opening
• Structure was constructed with a lot of attention to respecting the regulations on environmental protection and the prevention of contamination with mineral oil
• Weight and lever are made separately (modular concept), simple installation can be easily incorporated into individual approach to solving the specific operating conditions.
• Standard version is performed with 2 adjustable end position micro-switch (protection IP65) for detection of valve openness and closing
• On special request actuator can be equipped with a rotary encoder (4-20 mA) position or additional micro switches
• Intelligent design the valves with suitable sensors for closing or opening controlling of flow and pressure
• Standard version has adjustable of 2 damping stages for closing process. On request is performed in 3 stages damping with activation in any position closing process
• Automatic safety shut off, as a standard, offers the possibility to connect a reliable device (paddle trip mechanism) for detecting and triggering the flow over speed, eg, ruptured pipeline.
• The concept of electro-hydraulic control system NO (normally open) or NC (normally closed)
• With fixed mechanical limiters can be adjusted closed position ± 3%
• With self-aligning clevis with its (un) tightening can be adjusted open position ± 3%
• Adjustable the valve opening and closing time with flow control valve-pressure compensated with security function
• Using a “service pin” is possible to “locking” the valve at the open and close position in a case of service works as a safety
• Actuators type HAWL designed: max operation pressure 160 bar, test pressure 250 bar

Combined check butterfly Valves EN

Combined (Double eccentric BFV) material of construction 
1- Combined check valves material of construction.pdf
2- Combined check valves material of construction.pdf

 Combined Check DN1200 Dimensions 
Combined Check DN1400 Dimensions 
Combined Check DN1600 Dimensions 
Combined Check DN1800 Dimensions

 Combined Check DN1200 Dimensions 
Combined Check DN1400 Dimensions 
Combined Check DN1600 Dimensions 
Combined Check DN1800 Dimensions
 Combined Check DN2200 Dimensions

 Operation and Maintenance Manual

 Combined Check Valves