DINKONDA GLOBAL Power Plants Special O-type Fixed Ball Valve Heavy-duty Cut-off Ball Valve, Matched With High Torque Piston Pneumatic Actuator

DINKONDA GLOBAL Power Plants Special O-type Fixed Ball Valve Heavy-duty Cut-off Ball Valve, Matched With High Torque Piston Pneumatic Actuator

Product Overview

This pneumatic O-type fixed ball valve is developed and manufactured by DINKONDA GLOBAL. It belongs to the heavy-duty cut-off ball valve and is equipped with a high torque piston pneumatic actuator. It is a fixed ball structure designed specifically for large-diameter, high-pressure, and heavy-duty pipelines, with a focus on reliable and fast cut-off function. The complete set of valves integrates valve position feedback components, pneumatic pipelines, and pressure regulating accessories at the factory, and can be connected to DCS and PLC systems for remote switch control. It is the core self-control valve for emergency cut-off and programmable on-off in process industrial pipelines such as petroleum, chemical, coal chemical, and power stations.

Structural Composition

1. * * Valve body assembly**
Adopting a forged/cast integrated fixed ball valve body, with flange connections at both ends, the valve ball is supported and fixed in both directions by upper and lower valve stems. Unlike the floating ball structure, the ball does not displace with the pressure difference of the medium; The valve seat adopts a rear mounted sealing structure, which can be designed as a two-way seal. The valve body is made of forged steel material, with high pressure resistance, strong rigidity, and resistance to pipeline stress.

2. * * Valve ball and sealing pair**
O-shaped through-hole solid sphere, with a straight channel of equal diameter and minimal flow resistance; The sealing form can be soft seal (PTFE, reinforced fluoroplastic) or metal hard seal (hard alloy welding). The hard sealed version is resistant to erosion and high temperature, and is suitable for media containing particles; The soft sealed version can achieve zero leakage cut-off.

3. * * Drive mechanism (piston pneumatic actuator)**
High torque dual piston structure pneumatic actuator, blue high-strength housing, sufficient output torque, able to overcome the load caused by high pressure difference; Support double acting and single acting spring reset (fail safe type: fail on/fail off), suitable for emergency cut-off conditions.

4. * * Supporting self-control accessories**
Valve position feedback device (limit switch), gas source pressure regulating component, stainless steel gas source pipeline, directional solenoid valve; The feedback device can upload real-time signals of fully open and fully closed valve positions, and is equipped with explosion-proof selection to meet the needs of explosion-proof areas.

Product Features

1 * * Fixed sphere with strong load-bearing capacity**
The ball is supported by upper and lower shafts, and the sealing load is stable under high pressure difference, which is not easy to get stuck. The advantage of large-diameter high-pressure working conditions is obvious, and the sealing performance deteriorates slowly during long-term operation.

2 * * Direct O-shaped flow channel, excellent flow performance**
The through-hole structure has almost no flow resistance, allowing the medium to pass smoothly with low pressure loss and less accumulation of impurities, making it suitable for transporting liquid, gas, and slurry media.

3 * * Optional fault safety spring reset**
When the single acting model loses air or signal, it automatically returns to the preset safe position by relying on the spring force, meeting the emergency protection interlock requirements of the process ESD.

4 * * Bi directional sealing design**
It can achieve bidirectional pressure sealing in both forward and reverse directions, without being restricted by the flow direction of the medium, and the pipeline installation is more flexible.

5 * * Modular integrated complete supply**
The actuator, solenoid valve, pressure reducing valve, and valve position feedback device have been pre assembled and debugged at the factory, and only the gas source and control signal need to be connected on site, greatly reducing the on-site installation and debugging time.

6 * * Rich material options**
The valve body can be selected from WCB, F304, F316L, A105, etc. The sealing components are matched according to the medium and suitable for complex working conditions such as corrosion, high temperature, and solid particles.

7 * * Easy maintenance**
The valve seat has an online repairable structure, which allows for the replacement of seals without the need to remove the valve as a whole from the pipeline, reducing downtime maintenance costs.