01
FVP series resilient seal 3-way / pilot seat valve direct piping type / single unit (342 Series)
Detailed description
The FVP Series 342 represents a specialized category within pneumatic control components, utilizing a resilient metal seal construction in a lift-type configuration to achieve extremely low internal leakage. This 3-way pilot-operated seat valve is engineered for applications where conventional spool valves may prove inadequate due to inherent clearance leakage. The metal-to-metal sealing interface, combined with the lifting action of the valve mechanism, provides a level of shut-off integrity that approaches zero-leakage performance. This characteristic makes the series particularly suitable for circuits requiring reliable pressure holding over extended periods, such as in clamping applications, accumulator isolation, or systems where even minor leakage could affect process outcomes.
The valve's sealing capability extends into vacuum service without modification. It operates directly in negative pressure systems down to -101 kPa, effectively covering the full vacuum range encountered in industrial applications. This vacuum compatibility eliminates the need for separate vacuum-specific valves or additional sealing provisions when circuits must transition between pressure and vacuum conditions. Facilities working with vacuum pick-and-place operations, suction-based handling equipment, or systems requiring evacuation prior to pressurization can utilize the same valve type throughout, simplifying procurement and maintenance inventories.
Flow performance represents another distinguishing characteristic of this design. For a given pipe diameter, the FVP Series delivers higher flow capacity than comparable slide-type valves. This increased flow rate results from the lift-type geometry, which presents a more direct path for air movement when compared to the tortuous passages often found in spool valves. The reduced internal resistance means less pressure drop across the valve during operation, allowing actuators to achieve higher speeds or permitting the use of smaller valve sizes for a given flow requirement. System designers can sometimes specify a smaller pipe diameter than would otherwise be necessary, potentially reducing overall component costs and installation space.
The pilot-operated configuration ensures consistent shifting performance across the rated pressure range, with the main seat responding reliably to pilot signals. The direct piping format permits individual unit installation without manifold bases, allowing each valve to be positioned based on accessibility and circuit requirements rather than manifold constraints. This mounting flexibility proves advantageous in applications where valve count is modest or where distributed placement better serves the system architecture.
The combination of zero-leakage sealing, full vacuum capability, and favorable flow characteristics positions the FVP Series 342 as a practical choice for pneumatic circuits where these attributes align with application demands.
Graphic symbols
|
Internal pilot type N.C.
|
Internal pilot type N.O.
|
External pilot type
|
|
|
|
 |
Flow characteristics quality table
| Valve mode | Port size | Flow characteristics | Mass gNote) | ||||||
| 1→4/2(P→A/B) | 4/2 → 5/3(A/B →EA/EB) | Direct lead-out type | DIN shaped socket type | ||||||
| C[dm3/s∙bar)] | b | Cv | C[dm3/s∙bar)] | b | Cv | ||||
| VP342 | 1/8 | 3.5 | 0.26 | 0.8 | 3.6 | 0.26 | 0.9 | 149 | 185 |
| 1/4 | 4.2 | 0.22 | 1 | 4.2 | 0.23 | 1 | 145 | 181 | |
| VP542 | 1/4 | 7.9 | 0.21 | 1.8 | 7.2 | 0.27 | 1.8 | 249 | 285 |
| 3/8 | 8.9 | 0.16 | 2.2 | 8.9 | 0.2 | 2.1 | 241 | 277 | |
| VP742 | 3/8 | 11.9 | 0.21 | 2.7 | 11.8 | 0.2 | 2.7 | 484 | 520 |
| 1/2 | 15.1 | 0.21 | 3.6 | 15.3 | 0.22 | 3.7 | 467 | 503 | |
outline dimension diagram
