The bench clamps the valve from both ends along its axis, pressing flat sealing discs against the two end faces. It suits straight-through flanged gate, globe and ball valves, and it covers the widest size span in the range: the SYTW400/4-32 handles DN50–400, the SYTW300/16-32 DN80–300, the SYTW500/3-32 DN150–500, and the SYTW600/10-32 DN300–600. The models have a nominal maximum test pressure of up to 31.5 MPa, but the allowable test pressure depends on the valve size: for example, the SYTW600/10-32 reaches 31.5 MPa at DN300, while the maximum pressure decreases to 9.6 MPa for DN500–600. Clamping force differs by model: 72 ton-force (approx. 706 kN) on the SYTW400/4-32, 170 ton-force (approx. 1,667 kN) on the SYTW300/16-32, 90 ton-force (approx. 883 kN) on the SYTW500/3-32, and 350 ton-force (approx. 3,432 kN) on the SYTW600/10-32. If most of your valves are straight-through flanged valves, this is usually the starting point.
The SYTF series uses two sets of three-jaw clamping mechanisms to secure the valve flanges at both ends. One worktable can tilt upward by 90°, while the other moves axially to accommodate different valve lengths. The SYTF400/10-38 is supplied with four pairs of interchangeable flat sealing discs. The SYTF400/10-38 covers DN100–400 valves with an equipment maximum of 40.0 MPa — but, as with every bench, the applicable pressure steps down with size: 37.5 MPa for DN100–150, 22.5 MPa for DN200–250, 15.0 MPa for DN300, and 9.6 MPa for DN350–400. Clamping force is 185 ton-force (approx. 1,814 kN). Flange clamping holds the valve by its flanges without applying external test loads to the valve body.
The bench holds the valve vertically, with axial clamping applied to the valve end faces. The SYTL200/32-2T covers DN15–200 straight-through weld-end and flanged valves, with two test stations that help improve testing efficiency. The maximum test pressure steps down with size: 32 MPa for DN15–70, 26 MPa for DN80, 20 MPa for DN90, 16 MPa for DN100, 7.5 MPa for DN150, and 4 MPa for DN200. Clamping force is 20 ton-force (approx. 196 kN).
The SYTA150/10-32 is designed for pressure and seat-leakage testing of straight-through flanged valves, and it can also be used for safety-valve set-pressure adjustment and seat-tightness testing. It covers DN20–150, with a maximum test pressure of 32 MPa for DN20–80, 22 MPa for DN100 and 10 MPa for DN150. If safety-valve testing is part of your workload, the SYTA series provides a solution with the relevant adjustment capability.
Start by identifying the valve type and the required clamping arrangement. Then check the valve size, flange and face-to-face dimensions, and the maximum test pressure applicable to that specific size. Also confirm the required test medium and testing standard. A higher pressure rating does not make an incompatible clamping arrangement suitable.
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