BNE Series Explosion-Proof Electric Actuator for Rotary Valves - China Suppliers & Factory Direct Offer

(2) Explosion-proof rating

The explosion-proof grade of BNE explosion-proof electric actuator is: Exd II C T4 Gb

• Ex: Explosion-proof identification
• d: Explosion-proof type, expressed as "flameproof type"
• II: Device category, indicating electrical equipment for explosive gas environments other than coal mines
• C: Explosive level, which determines the dimensions (length and clearance) of each flame proof joint of the actuator
• T4: Temperature group, indicating that the maximum surface temperature of the actuator is allowed to be 135°C
• Gb: Indicates the protection level of the device

(3) Explosion-proof structure

The structure of BNE series explosion-proof products conforms to the relevant provisions of GB3836.1-2010《Explosive environment Part 1: General requirements for equipment》and GB3836.2-2010《Explosive environment Part 2: Equipment protected by flameproof housing "d"》standard, and adopts the flameproof structure of the whole machine.

The name of the product structure and some parts

Model designation

Construction features

• Housing: Aluminum alloy housing, polyester powder coated, strong corrosion resistance, protection class is IP66.
• Motor: Squirrel-cage motor, small size, large torque, low inertia, insulation class is F, built-in overheat protection switch, can prevent the motor from overheating.
• Manual operation: Safe and reliable hand design is very easy for manual operation. But make sure the power is “OFF" before manual operation. When the handle is free, put it in the socket beside the body for keeping.
• Dome indicator: The sight mirror indicates clearly, and the observation is more intuitive and convenient.
• Dryer: Dryer is used to control the temperature and avoid actuator internal moisture condensation caused by temperature or weather changes. To keep the electric elements dry.
• Seal: Good seals. Standard product protection grade is IP66, and optional IP67.
• Limit switch: Mechanical and electronic double position limit. Mechanical limit screw is adjustable, safe and reliable; Electronic limit switch controlled by cam mechanism, easy adjusting the cam can set position accurately and conveniently, and is not affected by excess hand operation.
• Self-locking: The high precision worm and gear mechanism has high effectively transfer and output large torque. And it's self-locking function, prevent reverse. Transmission part is stable and reliable, no need more grease.
• Anti-off bolt: When remove the cover, the bolt attached to the shell, will not fall off.
• Installation: The bottom connection is according to ISO5211/DIN3337. Can be installed in both vertical and horizontal installation.
• Circuit: Control circuit conforms to single or three-phase power supply standard, circuit layout is reasonable, compact terminals can effectively satisfy a variety of additional functional requirements.

Circuit diagram

Note: The circuit diagram of the control type (with field control) is referred to the module manual.

BNE005 Overall dimensions and performance parameters

BNE010 Overall dimensions and performance parameters

BNE020/040 Overall dimensions and performance parameters

BNE060/100/150 Overall dimensions and performance parameters

Installation and adjusting

1. Installation environment requirements

• 1) The types or categories of explosive media around the places of the devices must be in conformity to the explosion-proof regulation of this product.
• 2) Installed in a water flooded and outdoor place, please explain in advance.
• 3) Please reserve wiring, maintenance space such as for manual operation.
• 4) In order to avoid the rain, direct sunlight, need to install the protection cover, or chooses IP67 protection level.
• 5) Basic installation direction to keep the window to the top, the vertical pipeline actuators installation, cable interface to the ground.

2. Ambient temperature, medium temperature

• 1) The ambient temperature is in the range of -30℃ - 60℃.
• 2) When the ambient temperature is below zero, install a dehumidifier in the machine.
• 3) When the working medium is high temperature, the bracket connected with the valve plays a role in reducing heat conduction.
• 4) When the working medium temperature is below 60°C, please choose standard support.
• 5) When the working medium temperature is above 60℃, please choose high temperature bracket.

3. Valve connection

• 1) Manually turn the valve, confirm that there is no abnormal situation, and turn to the fully closed position, and fix the support on the valve.
• 2) Place the electric actuator on the support and screw it on gently with bolts and nuts.
• 3) Turn the electric actuator to the closed position, and fix the valve core shaft and the electric actuator output shaft with the coupling and screw.
• 4) Use the handle to turn the electric actuator, the movement is smooth, be careful not to cross the set limit switch limit.

Note: When installing, make sure that the switch of the actuator is consistent with the switch of the valve. The flange at the bottom of the actuator meets the ISO 5211 standard, and if the valve connected to it also meets this standard, it can be easily connected; If this standard is not met, an additional bracket connection is required.

4. Adjustment

1) Adjustment of Stroke limit: Turn the handwheel to move the actuator to the position where the valve is fully closed. Then, loosen the limit CAM tightening nut with a wrench, turn the limit CAM (yellow open, red close) to adjust it to just press the lower limit switch, and hear the 'click' sound for 2 times and then tighten the limit CAM, adjust the full close position, and set the full open position in the same way. (As shown in Figure 12)

2) Adjustment of mechanical limit: Loosen nut mechanical limit and then make sure the actuator move to the full-closed position. Rotate limiting nuts, then stop rotate when it comes across the fan-shaped gear inside and then screw out two circles and screw the nuts at last. (Shown in Figure 13)

3) Adjustment of potentiometer: Potentiometer is output as a feedback signal in the actuator, with three output pins, the middle pin is the output, and the left and right sides are the power supply (note: the resistor should not have a resistance value of zero and jump phenomenon). Use the handle to turn the valve to the fully open position. Use a multimeter to measure the operation of the limit switch. Adjust the pin resistance on the terminal to the range of 350-600. If it is not correct, it can be adjusted by turning the potentiometer transmission gear. (As shown in Figure 14)

5. Test Operation

1) Manual Operation: Cut power off before making manual operation. Insert the manual handle into the hexagonal hole underneath the rubber cap. Note: Opening to Full open and full-closed position, after the limit switch turns half circle, it will come across mechanical block. If rotate excessively, it would result the damage of other parts, so it should be avoided excessive force.

2) Power operation: Before making power operation, confirm that the indication on the position meter and the valve opening are matching each other. Confirm that the circuits are properly wired, also that the unit operates in correct direction with external switches.

• ① Check the wiring diagram, power supply, input/output signal correctly.
• ② Don't change the internal wiring.
• ③ Please check the rotating direction if the power supply is three-phase.
• ④ Make sure the actuator be in the on/off position, turn on the power and input the open signal.
• ⑤ If the actuator runs to the open direction, it means the wiring is correct.
• ⑥ If not, it must be changed 2 wiring lines of the 3 wiring line.

6. Maintenance & lubrication

• 1) The product uses special molybdenum base grease, so there is no need to add oil.
• 2) Regular rotation: When the valve does not work for a long time, the machine can be driven regularly to check for abnormalities.
• 3) For control type (with field control) instructions, please refer to the actuator control module manual (technical document attachment).