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Main Features
· Fast opening and closing: Driven by a pneumatic piston, it features fast operation (usually less than 1 second), suitable for applications requiring frequent and rapid switching.
· Low flow resistance: The valve body has a right-angle flow passage with a 90° change in medium flow direction, resulting in lower flow resistance and pressure drop compared with globe valves.
· Reliable sealing: Adopts single-sided sealing. The valve plug (usually conical or spherical) is pressed tightly against the valve seat under cylinder pressure, delivering good sealing performance and low leakage.
· Compact structure and flexible installation: The right-angle shape saves installation space, and the flow direction can be selected according to pipeline layout (horizontal inlet & vertical outlet or vice versa).
· Self-cleaning capability: When the valve opens, the medium flows through the valve seat area at high speed, providing certain scouring and self-cleaning effects on the sealing surface, helping maintain sealing performance.
· High temperature resistance: Angle seat valves with metal hard seals (e.g., stainless steel body + PTFE seals) can be used for high-temperature steam and other media.
· Low maintenance requirements: Relatively simple structure with few main moving parts, high durability and easy maintenance.
· Application limitations: Generally suitable for medium and low pressure conditions (e.g., below PN16), and not applicable to high-viscosity media or media containing solid particles.
■ Technical Parameters
| Parameter Category | Specific Parameters | Unit / Description | Typical Range / Significance |
| Basic Specification | Nominal Diameter (DN) | mm | DN10 ~ DN100 (common range, less used in large diameters) |
| Nominal Pressure (PN) | MPa | PN0.6 ~ PN2.5 (standard, some models up to PN6.3) | |
| Connection Type | - | Threaded (internal/external), clamp (hygienic), flanged connections | |
| Structure & Performance | Valve Body Material | - | Stainless steel (304, 316L), brass, PTFE (hygienic grade) |
| Sealing Material | - | PTFE, FKM, EPDM, metal seal | |
| Operating Temperature | ℃ | -10℃ ~ +180℃ (depending on sealing material; PTFE up to +180℃, EPDM approx. +120℃) | |
| Flow Coefficient (Kv) | m³/h | Relatively high; specific values to be checked according to diameter and model | |
| Leakage Class | - | Zero leakage (soft seal) or ≤ 0.01% Kv (metal seal) | |
| Response Time | s | 0.3 ~ 1.5 seconds (fast opening/closing is a key advantage) | |
| Service Life | million cycles | 500,000 ~ 2,000,000 cycles (depending on operating conditions and sealing material) | |
| Medium Viscosity Limit | cSt | ≤ 600 cSt (to avoid affecting response and sealing) | |
| Actuator | Actuation Mode | - | Single-acting (normally open / normally closed), double-acting (mainly pneumatic) |
| Air Supply Pressure | MPa | 0.3 ~ 0.8 (standard operating range) | |
| Minimum Operating Pressure | MPa | ≥ 0.15 (to ensure reliable operation) | |
| Optional Accessories | - | Solenoid valve, limit switch, manual handwheel, air treatment unit | |
| Medium & Application | Suitable Medium | - | Water, steam, neutral gases, weakly corrosive liquids/gases, food/pharmaceutical grade media |
| Flow Direction Requirement | - | Bi-directional flow (but flow direction as marked is recommended for better sealing) | |
| Mounting Position | - | Horizontal or vertical installation (actuator upward preferred to prevent foreign matter accumulation) |