Brand Overview

TOGNELLA in Italy focuses on the research and production of fluid control equipment, with products covering pressure, flow, and directional control valves, suitable for industrial hydraulics, mechanical manufacturing, and other fields, providing stable regulation and control solutions for fluid systems.

2、 Core technical principles

The TOGNELLA control valve achieves functional regulation based on the relative motion between the valve core and the valve seat. By changing the flow area or path switching of the valve port, it accurately controls the pressure, flow rate, and direction of the fluid. For different control requirements, there are two mainstream designs: direct acting and pilot type. The direct acting type relies on manual or electromagnetic force to directly drive the valve core action, with rapid response and compact structure; The pilot type controls the main valve action through a small flow pilot valve, which can adapt to high-pressure and large flow systems and improve regulation accuracy. The core design logic is to achieve precise control of fluid parameters through the combination of precision mechanical structures and fluid mechanics.

3、 Main technical features

（1） Structural design and sealing performance

Adopting a modular structure design, the valve body, valve core, and regulating components can be independently disassembled and replaced, making it easy to flexibly combine and adapt according to system requirements; Valve bodies are often made of high-strength cast iron or stainless steel materials, with anti-corrosion treatment on the surface, which can withstand long-term corrosion from industrial media. The sealing process adopts a hard soft dual quality sealing design. The hard sealing surface of the valve core is in contact with the conical surface of the valve seat to form the main seal, supplemented by embedded fluoroplastic or nitrile rubber soft sealing layer, achieving low leakage control. Some models can achieve low leakage standards in the industry. At the same time, the connection between the valve core and the valve stem adopts a rotating sealing structure to reduce sealing loss caused by motion friction and extend the service life of the sealing components.

（2） Adjusting performance and adaptability

Flow control valves are designed with conical throttling ports or stepped valve discs to achieve linear adjustment of flow, and can maintain stable flow even when there are pressure fluctuations, making them suitable for process links that require precise flow control; Pressure control valves are equipped with pressure regulating springs and feedback mechanisms. When the system pressure exceeds the preset value, the valve core automatically acts to release and reduce pressure, and the pressure control accuracy can be controlled within a small deviation range. Multiple driving modes are provided for different working conditions, including manual, electromagnetic, pneumatic, etc. Among them, the electromagnetic driving model has a response time as low as 0.5 seconds, which can meet the requirements of fast control; The pneumatic drive model is suitable for smooth operation of large-diameter valves. In addition, the valve diameter covers more than DN10 to DN200 specifications, and the nominal pressure is compatible with the range of 0.1MPa to 40MPa, which can match different needs from low-pressure civilian equipment to high-pressure industrial systems.

（3） Durability and maintenance characteristics

The valve core is made of wear-resistant alloy material, which is precision machined to ensure surface smoothness and reduce the erosion and wear of fluid impurities on the sealing surface; The valve stem is made of quenched and tempered alloy steel, which has high fatigue strength and can withstand the mechanical impact caused by frequent movements. In terms of maintenance, key vulnerable parts such as seals and springs are designed with standardization, and replacement does not require specialized tools. Operators can complete routine maintenance according to the manual; Some models have built-in status monitoring interfaces that can be integrated with the system PLC to provide real-time feedback on valve switch status and fault information, facilitating early prediction of maintenance needs and reducing sudden downtime. At the same time, the overall structure of the valve has been optimized, with smooth flow channel design, reducing vibration and noise caused by fluid impact, and reducing structural losses during long-term operation.

4、 Typical technical parameters (universal reference)

Product types: pressure control valve, flow control valve, directional control valve (classified by function)

Nominal diameter: DN10-DN200

Nominal pressure: 0.1MPa-40MPa

Applicable media: hydraulic oil, lubricating oil, water, neutral gases, and low corrosive chemical fluids

Working temperature range: -20 ℃ -+120 ℃ (adjusted according to the sealing material)

Adjustment accuracy: Flow regulation deviation ≤± 3% FS; pressure control deviation ≤± 5% set value

Response time: Direct acting type ≤ 0.5 seconds; Pilot type ≤ 1.5 seconds

Drive mode: manual, electromagnetic (DC24V/AC220V), pneumatic (0.4-0.8MPa)

Valve body material: cast iron (HT250), stainless steel (304/316)

Sealing materials: Nitrile rubber (NBR), Fluororubber (FKM), Polytetrafluoroethylene (PTFE)

Adaptation standard: Complies with ISO 5598 fluid control valve standard; Meets CE certification requirements

5、 Main application scenarios

（1） Industrial hydraulic system

In hydraulic systems of machine tools, injection molding machines, and other equipment, flow control valves are used to regulate the expansion and contraction speed of hydraulic cylinders, ensuring the smooth movement of the machining process; The pressure control valve maintains stable system operating pressure and prevents overload damage to the hydraulic pump and actuator components. For example, in the hydraulic chuck system of a CNC lathe, the clamping force of the chuck is precisely controlled by the TOGNELLA pressure valve to ensure that the workpiece is firmly clamped and does not deform.

（2） Mechanical manufacturing field

Used for hydraulic circuit control of construction machinery, such as the boom and boom hydraulic cylinder circuits of excavators, the directional control valve realizes oil circuit switching to control the direction of action, and the flow valve adjusts the action speed; In the conveying equipment of automated production lines, precise start stop and speed adjustment of hydraulic drive mechanisms are achieved through electromagnetic control valves, adapting to the rhythm control requirements of the assembly line.

（3） Petrochemical industry

In the feeding system of small and medium-sized chemical reaction vessels, the flow control valve regulates the raw material conveying rate to ensure stable reaction ratio; In the lubricating oil circulation system, the pressure control valve maintains the oil supply pressure to ensure proper lubrication of equipment bearings and other components. Its corrosion-resistant stainless steel valve body model can be adapted to control pipelines containing slightly corrosive media, such as flow regulation of ethylene glycol solution.

（4） Energy and Power Sector

In the lubrication system of small thermal power generation units, the flow control valve distributes the amount of lubricating oil to each bearing, and the pressure control valve monitors the system oil pressure to prevent equipment wear caused by insufficient oil supply; In the auxiliary hydraulic system of a hydroelectric power station, a pilot type control valve is used to control the action of the gate opening and closing mechanism, achieving smooth lifting and positioning of the gate.

（5） General equipment manufacturing

In the oil gas separation system of the air compressor, the pressure control valve maintains stable pressure inside the separation tank to ensure the quality of compressed air; In hydraulic lift systems, one-way control valves prevent accidental backflow during the descent of heavy objects, and work together with flow valves to achieve smooth lifting and lowering, adapting to the lifting equipment needs of storage logistics, building decoration, and other scenarios.