Overview
STF series filling valve belongs to the stop valve category, mainly used for large flow filling or draining of various oil cylinder plug chambers to increase their idle speed and return speed.It can be installed in the pipeline through high-pressure flange stacking, so installation and maintenance are very convenient, and it can replace imported products. This series of filling valves is normally closed, and its working principle is similar to that of hydraulic control check valves. The flow direction A → B can flow freely, while the flow direction B → A is controllable. When there is control pressure at port X, the check valve opens, and B → A is connected. When the pressure at port X is released, the check valve closes, and B → A is blocked.
| Technical Data | ||||
|---|---|---|---|---|
| Oil Port | A | B | X1 | X2 |
| Rated Pressure ( bar ) | 16 | 320 | 200 | 200 |
| Opening Pressure ( bar ) | 0.5 | |||
| Working Fluid | Mineral - based hydraulic oil | |||
| Oil Temperature Range oil( ℃ ) | -20~+60 | |||
| Viscosity Range ( mm²/s ) | 2.8~380 | |||
| Oil Cleanliness | The maximum allowable contamination level of the oil is NAS 1638 Class 9. We recommend a minimum filter ratio of B₁₀≥75. |
Model description
STF type pre-fill valve, hydraulic prefill valve for hydraulic press, high flow, reliable sealing, fast filling & oil return. Suitable for bending machine, forging machinery, hydraulic system. Custom specifications available.
| Size | H1 | H2 | H3 | D1 | D2 | D3 (O ring) | D4 | D5 | D6 | D7 |
|---|---|---|---|---|---|---|---|---|---|---|
| 32 | 27 | 55 | 16 | 34 | 43 | 50.39*3.53 | 93 | G1/4 | 110 | 4-M16 |
| 40 | 28 | 60 | 16.5 | 39 | 54 | 63.09*3.53 | 108 | G1/4 | 125 | 4-M16 |
| 50 | 29 | 72 | 17 | 46 | 73 | 82.14*3.53 | 128 | G1/4 | 145 | 8-M16 |
| 63 | 33.5 | 83 | 22 | 50 | 86 | 94.62*5.33 | 143 | G1/4 | 160 | 8-M16 |
| 80 | 38.5 | 97 | 27 | 56 | 108 | 116.84*5.33 | 169 | G1/4 | 190 | 8-M20 |
| 100 | 44 | 118 | 32 | 69 | 132 | 142.24*5.33 | 212 | G1/4 | 240 | 8-M27 |
| 125 | 51 | 155 | 39 | 88 | 170 | 183.52*5.33 | 248 | G1/4 | 280 | 8-M30 |
| 160 | 70 | 233 | 55 | 120 | 215 | 227.97*5.33 | 310 | G1/4 | 345 | 12-M33 |
About Us
Taifeng Intelligent — China hydraulic components manufacturer & supplier. We are a national high-tech enterprise founded in 2000, based in Jining, Shandong, China.
Main products: hydraulic cartridge valve / two-way cartridge valve, hydraulic piston pump / axial piston pump, multi-way directional control valve, prefill valve, hydraulic cylinder and electro-hydraulic integrated control system. As the world's largest two-way cartridge valve maker (about 70% domestic share), we are also a leading hydraulic integrated system producer.
Applications: construction machinery, machine tool, metallurgy, mining, plastic machinery, agricultural machinery, rail transit, marine and energy equipment.
We hold ISO 9001 certification and were named an MIIT Manufacturing Industry Single-Item Champion Demonstration Enterprise in 2016. Custom OEM/ODM hydraulic valve, pump and cylinder solutions are available. Contact us for factory price, fast quotation and global shipping.
