A good machine must have the correct method of operation, and the most important thing is to have sufficient pre-operation preparation. The specific operation method of the electric valve includes two parts of preparation work before operation and precautions during operation, as follows: (1) Preparation before operation 1. Read the operating instructions carefully before operating the valve. 4. For electric devices that have been deactivated for more than 3 months, check the clutch before starting. After confirming that the handle is in the manual position, check the insulation, steering and electrical wiring of the motor. (two) electric valve operation precautions 1. When starting, confirm that the clutch handle is in the corresponding position. 2. If the electric valve is controlled in the control room, turn the transfer switch to the large REMOTE position, and then control the electric valve switch through the SCADA system. 4. When using the valve in the field, the valve opening and closing instruction and the valve stem operation should be monitored. The valve opening and closing degree should meet the requirements. 5. When using the on-site operation to fully close the valve, before the valve is closed, stop the electric shut-off valve and use the micro-motion to close the valve. 7. In the process of opening and closing the valve, if the signal indicator light is found to be wrong and the valve has abnormal noise, it should be stopped and checked in time. 8. The power of the electric valve should be turned off after the operation is successful. Concerned about surprises Label: specific operation method of electric valve Previous: Types and characteristics of springs used in vibrating screens Next: Double effect evaporation treatment process for furfural wastewater treatment
Rectangular prisms(right angle prism) are used to deflect a beam of light through 90 or 180 degrees. This can be used as component to create various optical devices.Rectangular prism/right angle prism is often used in telescope,periscope and other optical system. N-bk7 material can be used for a range between the visible and infrared light. Fused silica material can be used for a range between ultraviolet and infrared light. China star optics offers a wide range of different materials and different degrees of precision prisms, such as Wedge Prism,right angle prism,rhombohedral prism,Dove prism,Penta prism,pyramid prism,dispersing prism etc.
Specification of our prisms like follow: Right Angle Prism,Optical Glass Right Angle Prism,Optical Prisms Kits,High Precision Right Angle Prisms China Star Optics Technology Co.,Ltd. , https://www.opticsrealpoo.com
2, must be clear before the operation of the flow of gas, should pay attention to check the valve opening and closing signs.
3. Check the appearance of the electric valve to see if the electric valve is damp. If there is moisture, it should be dried. If there are other problems, it should be handled in time, and no fault operation is allowed.
3. If the control is manual, put the transfer switch in the LOCAL position and operate the switch of the electric valve on the spot. When the electric valve is in position or closed, it will automatically stop working. Finally, the running change switch will be hit to the middle position.
6. For the valve after setting the stroke and over-torque controller, when the valve is fully open or closed for the first time, it should pay attention to monitor the control of the stroke. If the valve switch does not stop at the position, it should be manually stopped immediately.
9. When operating multiple valves at the same time, pay attention to the operation sequence and meet the production process requirements.
10. When opening a larger diameter valve with a bypass valve, if the pressure difference between the two ends is large, first open the bypass valve to regulate the pressure, and then open the main valve: immediately after the main valve is opened, the bypass valve should be closed immediately.
11. When the clearing ball (device) is sent and received, the ball valve that passes through it must be fully open.
12. Operate ball valve, gate valve, globe valve and butterfly valve can only be fully open or fully closed. It is strictly for adjustment.
13. When operating the gate valve, globe valve and flat valve, when closing or opening to the top dead center or bottom dead center, turn 1/2 to 1 turn. 
Material: HK9L Grade A optical glass,Fused Silica JGS1,JGS2,JGS3, or other optical glass materials.
Dimension (mm):1.0-300.0 mm.
Dimension Tolerance(mm): +0.0/-0.2 (General), +0.0,/-0.05(High Precision)
Clear Aperture: >90%
Angle Tolerance: <3 min(General), <3 sec (High Precision)
Flatness@ 633 mm: l/2λ(General), l/4λ(High Precision)
Surface Quality:60/40 (General), 10/5(High Precision)
Bevel(mm): 0.1mm to 0.5 mm
Coating: Uncoated,AR,HR coating etc.