The 2/2-way externally controlled valves are pneumatically or hydraulically operated valves with two port connections and two switching positions. Actuation of these valves is usually achieved using an installed 5/2-way valve or through an existing valve terminal.
Switching times can be set as desired using throttles on the pilot valve; opening and closing can be delayed up to three seconds to prevent hydraulic pressure surges in pipeline systems. Due to the unique coaxial design, most valves can operate using only 45 psi of instrument air pressure; the air consumption per stroke is sometimes only 1/10 of the value of valves from well-known competitors. By using co-ax® valves, the consumption of expensive compressor air is minimized so that these valves are particularly energy-efficient.
Due to their very high switching force, externally controlled valves can be equipped with additional wiper rings. These valves are ideally suited for sticky or abrasive media such as ceramic slip, glue, paste, paint, or grinding emulsion/oil.
The externally controlled valves are available with nominal orifice sizes of approx. 0.31" to 10". The media pressure range extends from vacuum to 1500 psi. The tightness of the valve seat is guaranteed when control air or hydraulics is applied up to the full pressure rating in accordance with DIN 12266 - regardless of whether the valves are operated in the preferred or the opposite direction. When instrument air or hydraulics is not applied, the seat tightness in the opposite direction is a maximum of 240 psi. Technical details can be found in the respective data sheets. The flow factor (Cv value) ranges from 2.9 to 750 GPM. Depending on the nominal size, the valves are available with port connections that are threaded, flanged or with special designs. This series is available with ATEX Zone 1/Category 2 rating.
The valves can be optionally equipped with features such as a variety of pilot valves, various limit switches, mounting brackets, and a variety of electrical plug connections including M12x1 DESINA/VDMA.
| co-ax type | orifice inch approx. |
connection | max. pressure range | Cv value |
|---|---|---|---|---|
CFM 08 |
0.31" | threaded | 0-600 psi | 1.8 GPM |
MCF 08 |
0.31" | threaded | 0-1500 psi | 1.8 GPM |
VMK 10 |
0.375" | threaded | 0-1500 psi | 2.9 GPM |
VMK / VFK 15 |
0.50" |
threaded flanged |
0-1500 psi | 6.6 GPM |
VMK / VFK 20 |
0.75" |
threaded flanged |
0-1500 psi | 10.2 GPM |
VMK / VFK 25 |
1.00" |
threaded flanged |
0-1500 psi | 15.4 GPM |
VMK / VFK 32 |
1.25" |
threaded flanged |
0-1500 psi | 23.1 GPM |
VMK / VFK 40 |
1.50" |
threaded flanged |
0-1500 psi | 35.8 GPM |
VMK / VFK 50 |
2.00" |
threaded flanged |
0-1500 psi | 49.7 GPM |
VSV-M / VSV-F 40 |
1.50" |
threaded flanged |
0-600 psi | 35.8 GPM |
VSV-M / VSV-F 50 |
2.00" |
threaded flanged |
0-600 psi | 49.7 GPM |
VSV-F 65 |
2.50" | flanged | 0-600 psi | 78.6 GPM |
VSV-F 80 |
3.00" | flanged | 0-600 psi | 104 GPM |
VSV-F 100 |
4.00" | flanged | 0-600 psi | 161.8 GPM |
VSV-F 125 |
5.00" | flanged | 0-600 psi | 228.9 GPM |
VSV-F 150 |
6.00" | flanged | 0-600 psi | 316.7 GPM |
VSV-F 200 |
8.00" | flanged | 0-240 psi | 520.2 GPM |
VSV-F 250 |
10.00" | flanged | 0-240 psi | 751.4 GPM |
FCF 25 – FCF 150 |
1.00" - 6.00" | flanged | 0-600 psi | 31.2 GPM |
FCF-K 65 – FCF-K 125 |
2.50" - 5.00" | flanged | 0-600 psi | 113.3 GPM |
