Contact: General Manager Wang
Mobile: +86 13862704321
Tel: +86-513-88402039
Email：wjf@ywjx.net
Website：www.ywjx.net
Address: No. 88 Fuqian Road, Baidian Town, Haian County, Jiangsu Province, China
Bottom silo outlet valve mainly make up of single screw gate, pneumatic on-off valve, connected air slide, motorized flow control valve and outlet chute etc. Radial clearance between on-off valve, valve core of flow control valve and connections may be adjusted. The temperature of conveyed material is considered at common temperature at ex-work. When material temperature is higher than 50 centigrade, valve core will not operate usually. It may rotate hollow bolt in the back of flange of flow control valve to adjust radial clearance between adjustable valve core and connections. Four hollow adjustable bolts should be even when adjusting them. It will meet clearance request by rotating 10° to 20°.
Structure dimension drawing
1、Outlet elbow
2、Motorized flow control valve
3、Pneumatic on-off valve
4、Branch case
5、Sealing type screw gate
Technical parameter
| Name | Spec. | |||
| 200/250 | 200/315 | 200/400 | ||
| Conveying material | Cement or raw material | Cement or raw material | Cement or raw material | |
| Bulk Density t/m³ | Cement | 0.75-1.05 | 0.75-1.05 | 0.75-1.05 |
| Raw material powder | 0.70-1.00 | 0.70-1.00 | 0.70-1.00 | |
| Material temperature℃ | <100 | <100 | <100 | |
| Material Moisture | <1% | <1% | <1% | |
| The Max. passing capacity m³/h | 6° | 100 | 180 | 350 |
| 8° | 115 | 210 | 420 | |
| 10° | 145 | 245 | 520 | |
| 12° | 170 | 300 | 630 | |
| Single Screw gate | 310×310 | |||
| Pneumatic rotary valve | 200×200 | |||
| Air cylinder | QGB-FK100×200MP4 | |||
| Continuous air slide | B250 | B315 | B400 | |
| Motorized flow control valve | B250 | B315 | B400 | |
| Motorized actuator | AS-25 | AS-25 | AS-25 | |
Installation
The screw gate, distribution box, shut-off valve, and flow control valve of the discharge device are generally supplied assembled, with lubricating grease already applied. During on-site assembly of components, if any foreign matter is found, it must be thoroughly cleaned before assembly.
Installation of Silo Side Discharge Device
Before installation, verify that the flange slope between the silo side discharge port and the screw gate interface of the discharge device meets the process design requirements. Begin installation with the screw gate. A sealing gasket must be placed between the screw gate and the silo side discharge port flange, secured with bolts. Ensure the screw gate opens and closes freely without any obstruction affecting its operation.
After the screw gate is installed, proceed with the shut-off valve. Install a sealing gasket between the shut-off valve inlet and the outlet flange of the screw gate, connect with bolts and fasten securely. Check that the shut-off valve's open/close position is within the effective range and free from foreign matter jamming. After confirmation, proceed with the flow control valve installation following the same steps as the shut-off valve.
Once all valves are installed, connect the aeration piping and electrical wiring respectively, and prepare for commissioning.
Installation of Silo Bottom Discharge Device
Start with the silo bottom screw gate. The screw gate must be installed horizontally. A sealing gasket shall be placed between the gate and the silo bottom discharge port flange, connected with bolts and fastened securely. Ensure the screw gate opens and closes freely without any obstruction.
Install the silo bottom distribution box. A sealing gasket must be used between the distribution box and the screw gate. After installation, clean out any foreign matter inside the distribution box.
Install the shut-off valve. Install a sealing gasket between the shut-off valve inlet and the outlet flange of the distribution box, connect with bolts and fasten securely. Check that the shut-off valve's open/close position is within the effective range and free from foreign matter jamming. After confirmation, proceed with the flow control valve installation following the same steps as the shut-off valve.
Once all valves are installed, connect the aeration piping and electrical wiring respectively, and prepare for commissioning.
Operation
Open the screw gate, then open the aeration line valve to aerate the discharge aeration box. Open the electric/pneumatic shut-off valve, then open the flow control valve. Adjust the valve core opening via the electric/pneumatic actuator until the throughput meets the required flow rate.
The discharge system requires that the conveyed material be free from metallic objects, agglomerates, and other foreign matter; otherwise, the system may become blocked or the equipment may be damaged, and normal system operation cannot be guaranteed.
