Preventive maintenance is planned maintenance before the failure of the regulating valve. It can be understood as routine maintenance. According to the Xiaobian of the hardware network, it usually includes the following tasks.
Stress relief
The pipeline may generate various stresses due to improper combination or installation, such as thermal stress generated by high temperature medium, stress caused by unbalanced tightening force during installation, stress caused by some human collisions to the regulating valve and its piping. These stresses act on the regulating valve and its pipelines, which can easily affect the performance of the regulating valve. In severe cases, it will affect the regulating system itself, causing the stem and the guide to deform and not centered with the valve seat; for the split valve The body's regulating valve may cause the valve body flange to disengage; the stress may also cause the valve seat to leak. Therefore, at all times, it is necessary to ensure that stress is avoided or eliminated, and the stress is directed away from the regulating valve.
Check support
The optimum position for the installation of the regulating valve is such that the stroke direction of the valve stem is in a vertical plane with the actuator above the valve body. If the regulating valve must be installed at a position where the valve stem is moved horizontally, or if the direction of movement of the valve stem is at a certain angle to the horizontal plane, the actuator should be supported so that the various components of the regulating valve are in a natural state. If the support is not added or the support is improperly installed, the valve stem and the valve seat may be different from each other, which may cause a fault or a leak of the filler. Even if the regulating valve has fixing and supporting measures, it must be inspected regularly, usually once every 2 to 3 months.
Remove or prevent foreign matter from entering
Always check the presence or absence of rust, welding slag, dirt, etc. in the connecting pipe of the regulating valve, and remove it in time. If it is easy to accumulate foreign matter in the regulating valve and piping, consider installing a simple filtering device on the upstream side of the regulating valve. Where it is easy to penetrate hard materials in the process medium, it is necessary to install a permanent filter device. Because the control valve is closed, a small piece of rust or welding slag is enough to damage the well-welded seat sealing surface, and these dirt can also cause wear on the regulating valve spool and seat, affecting its normal operation.
Check the air supply and power supply regularly
The gas source is one of the key energy sources for driving the regulating valve. Although the membrane chamber of the pneumatic control valve does not consume air, if the air source system contains impurities such as moisture and oil, the valve positioner, the relay and other accessories may be blocked and malfunction. Therefore, the gas source and power source must be inspected regularly to ensure that the gas source is clean and dry, and the power supply is reliable.
Regular maintenance and refueling
Fillers and oilers need to be re-adjusted after a short period of use. In the case of dust, the packing box and the guiding part should be protected by a plastic sleeve or a rubber sleeve around the valve stem. When there is corrosive gas or liquid droplets, special protective measures should be adopted. Generally, the control valve is wrapped with an anti-corrosion bag, but Note that it does not affect its operation. In the case of fire resistance requirements, special refractory coatings, fireproof bags, etc. may be used. The material of the fireproof bag contains multiple layers of ceramic fibers or glass fibers.
Transportation and storage
After the adjustment valve is assembled and painted and attached to the actuator, handwheel, positioner and other accessories as required, in order to prevent foreign matter from entering the regulating valve, all air ports connecting the regulating valve should be blocked, and the connecting flange is equipped with a protective cover. Pay attention to the connection points, such as the position of the valve positioner intake pipe and the actuator interface. Any protruding accessories that are easily damaged, such as oil gauges and potentiometer pressure gauges, should be removed from the joint and packaged separately with the regulator valve. The adjustment valve is fixed by a special bracket to prevent looseness and to ensure the overall vertical position or horizontal position. If transported over long distances, it is best to ship in a solid wooden case.
When storing the regulating valve, do not support the regulating valve in sensitive parts such as valve positioners, valve stems, etc. Environmental conditions for transportation and storage should meet the requirements of the product specification. It is best not to carry out other work in the storage area. If it is unavoidable, care must be taken not to touch the regulating valve. The site should also be protected from harsh conditions such as sand, dust, rain, etc. If there is no suitable place, the regulator valve must be placed in a moisture-proof bag or placed in a similar container before storage.
Safe operation check
Regulators and related accessories used in explosive hazardous areas should be checked for safe operation, such as whether the sealing cover is tightened, the operation of the safety barrier, the power supply, etc., to ensure that the regulating valve and related accessories can operate safely.
Concerned about surprises
Label: What is the difference between preventive maintenance and routine maintenance? Preventive maintenance of the regulating valve
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Characteristics and Advantages
(1) Intelligent control design: adjustable main parameter and secondary parameter automatically according to the weight of door leaves;
(2) Low noise: Special static sound track, integration of motor, worm-gear and retarder.
(3) Anti-clamping function: automatically reverse when meeting barriers;
(4) Unique electronic motor lock: the motor will lock up when the door is forced to open.(controlled by remote or switch)
(5) Tighten force: seal door when closed, power consumption approximately 10W under standby;
(6) Advanced brushless motor(36V,100W) can automatically adopt different heavy door leaves;
(7) Bi-doors inter-locking: one of the door leaves always remains closing;
(8)Safety sensor terminal: sensor stops working when door closed;
(9)Unique coating technology: never rusty;
(10)Easy and convenient to install;
(11)Working Process: when the door leaf closes to the right place, the door leaf will slightly shift to the door frame and the ground. The rubbers on the four sides of the door leaf will completely combine with door frame and ground, which ensures air tightness. When the door is open, the rubbers will separate from door frame and ground, which avoids contraction on the ground.
Technical Specification
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Specification |
Light Duty |
Heavy Duty |
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Rang of the Door |
Single-Leaf |
Double-Leaf |
Single-Leaf |
Double-Leaf |
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Door leaf max weight |
100kg |
100kg x 2 |
200kg |
200kg x 2 |
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Mounting Method |
Surface mounting or built-in mounting |
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Open Width |
700-2000mm |
650-2000mm |
750-2000mm |
650-2000mm |
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Power Supply |
AC 220v ± 10%, 50-60 Hz |
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Opening Speed |
300-500mm/s (adjustable) |
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Closing Speed |
250-550mm/s (adjustable) |
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Creep speed |
30-100mm/s (adjustable) |
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Hold-open time |
0.5-20s (adjustable) |
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Airproof Force (Max.) |
>70N |
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Manual Pushing Force |
<100N |
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Electronic Lock Force |
>800N |
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Power consumption |
150W |
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Ambient temperature |
-20+50 C |
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Technical Details:
(1) Rubber lining sealing technology combined with V groove on the guide rail enables the door completely sealed when the door closed;
(2)Special door body location technology. Semicircular surface beam on the ground matches with the V style groove at the bottom of door leaf, which stop the door from swing and make sure it moves stable and smooth;
(3) The door body decorated with matte stainless steel or spray surface, and on the middle and both sides with sealing stripes to ensure the hermetic effect.
(4)Feet sensor switch applied to avoid contagion;
Stainless Steel Sliding Door,Stainless Steel Bypass Sliding Door,Stainless Steel Interior Sliding Door,Stainless Steel Folding Sliding Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.highspeedshutterdoor.com