Schwing Rock valve is the core mechanism of concrete pump. It is located between hopper, concrete cylinder and delivery pipe. The rock valve has small inlet and outlet, small pumping resistance, convenient maintenance and durability.
Schwing rock valve is made of 25CrMoV, strong toughness and wear resistance.
| C | Si | Mn | Cr | Mo | V |
| 0.22～0.29 | 0.17～0.37 | 0.40～0.70 | 1.5 | 0.25～0.35 | 0.15～0.30 |
| Tensile Strength σb | Yield Strength σs | Elongation δ5 | Reduction of Area ψ | Impact Absorption Energy Aku2 |
| ≥ 930Mpa | ≥ 780Mpa | ≥ 14% | ≥ 55% | ≥ 63J |
| Item | Part Number | Size |
| 1 | 10059467 | DN210/180 |
| 2 | 10181912 | DN220/180 |
Rock valve work at hopper, and the bottom of the rock valve can be perfectly fitted with the hopper, which solves the stubborn problems of S valve, such as easy pipe plugging, large pumping resistance, large fuel consumption and so on.