Single seat valve 21000
Valves for the widest range of applications. Special single-stage anti-cavitation or anti-noise designs are available for critical operating conditions. Single seat valves, due to their simplicity and reliability, can be used in a wide range of pressures and temperatures. The reinforced top guide of the plug ensures its stability in the flow, even under challenging operating conditions.
Technical specifications
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Nominal diameter DN 25 to 200 mm
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Nominal pressure PN 1,0 to 42 MPa
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Operating temperature - 196 to 560 °С
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Flow capacity Сv 0,1…640 / Kv 0,09…550
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Flow characteristic linear / equal percentage
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Rangeability 50:1
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Seat leakage class IV, V, VI according to GOST 9544-2015 / class А according to GOST 9544-2015
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Body material carbon steel / cold-resistant steel / heat-resistant steel / stainless steel / corrosion-resistant alloys
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Packing material carbon+PTFE / graphite
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Connection flanged / welded
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Actuator pneumatic spring-diaphragm / pneumatic piston / electric / manual
Execution options
With a quick change or threaded seat ring
tightness and vibration resistance under high pressure drops. The quick-change seat design allows for the replacement of the assembly without complete disassembly of the valve and its removal from the pipeline – this significantly reduces maintenance time and equipment downtime, especially during operation in continuous technological processes.
With an extension bonnet for high-temperature or cryogenic media
Extension bonnet provides effective thermal insulation for the packing gland assembly. Heat from the process fluid is not transferred to the actuator and seals, ensuring that the temperature in the gland area does not exceed 100 °C. This design guarantees reliable valve operation in both high-temperature and cryogenic conditions, maintaining tightness, control accuracy, and a long service life for the Carbon/PTFE packing.
With an anti-cavitation trim
The special multi-stage trim design (single or double stage) consistently reduces flow pressure, preventing the formation of vapor bubbles and subsequent erosion of valve components. This ensures smooth throttling, reduced noise and vibration, and an extended service life for the seat and plug, even in aggressive or abrasive media applications.
With a double stage anti-cavitation trim
The trim consists of two successively arranged throttling stages, each gradually reducing the working fluid pressure, preventing the fluid from transitioning into the vapor phase and destruction of components by the flow. This solution ensures maximum protection of the body and seat from erosion, minimal noise and vibration levels, and high control stability when operating under severe service conditions.
With a double stage anti-noise trim
prevents turbulence and acoustic oscillations. This results in a significant reduction in noise levels without compromising flow capacity, enhances operational comfort and safety, and extends the valve's service life by reducing vibration.
Angle valve
It is used in systems where it is necessary to change the flow direction by 90° or it is necessary to place the valve in a limited space. The angle body design ensures optimal hydrodynamic characteristics, reduces flow resistance, and minimizes the risk of dead zones. Such valves are particularly effective for vaporized, contaminated, or crystallizing media, and are also beneficial when it's crucial to minimize connections and increase pipeline system reliability.
With backup O-rings on the packing follower
Provides enhanced tightness of the stem assembly and protects the environment from potential leaks. Additional O-rings work in conjunction with the main gland seal to create a double barrier that maintains tightness even under wear or pressure fluctuations. This design is particularly effective when handling toxic, volatile, or valuable media, ensuring reliability, stability, and a long service life without frequent maintenance.
With bellows seal
Designed for installations with increased requirements for tightness and safety. Tightness is ensured by a metal bellows, which completely prevents the working medium from escaping into the atmosphere, even during long-term operation. The bellows operates under external pressure and is protected by guide bushes, ensuring resistance to vibrations and pressure drops. This design is optimal for toxic, explosive, and vacuum media where leakage is unacceptable, and guarantees durability, reliability, and maintenance-free operation of the packing gland assembly.
With a steam jacket heating
To maintain the temperature of the working medium inside the valve. The steam jacket ensures uniform heating of the body, preventing thickening or crystallization of viscous or temperature-sensitive fluids, and also reduces the risk of condensate formation. It is used in systems with high medium viscosity or in low-temperature environments.
In accordance with the requirements of the NACE MR 0103/01-75 standard for media containing hydrogen sulfide
This valve is built with corrosion-resistant materials and a robust design to withstand hydrogen sulfide. It guarantees long-term durability and dependable performance in aggressive environments where selective or general corrosive wear may occur, adhering to NACE MR 0103/01-75 standards for the oil and gas and chemical industries.
With adaptation to an aggressive environment containing corrosive gases or acid vapors, as well as the marine atmosphere
The valve is constructed with materials and protective coatings that ensure resistance to corrosion and durability when operating in aggressive industrial and coastal environments. It ensures dependable operation in environments containing acidic or corrosive gases and high marine air humidity.
With a leak-off packing
The valve is equipped with a control system for detecting and diverting minor leaks through the gland packing, which prevents the working fluid from entering the environment and enhances operational safety. This design allows for prompt detection and control of leaks, reducing the risk of accidents and the need for frequent maintenance.
Features
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Simple and reliable designIt is a key feature of the valve, ensuring its stable operation and ease of maintenance. The minimal number of moving parts and sealing components reduces the risk of failures, while the smart component layout guarantees stable tightness and durability under any operating conditions. As a result, the valve maintains high reliability, is easy to install and maintain, and requires minimal operating costs.
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High-strength stainless steel trimEnsures reliable and durable valve operation under high loads and pressure drops. The material is highly resistant to corrosion, cavitation, and erosive wear, making the valve a versatile solution for various types of working media—from neutral to aggressive. Thanks to the strength and geometric stability of the trim, precise regulation and tightness are maintained throughout the entire service life.
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Various sizes of actuatorsThis ensures efficient and stable operation under both low and high pressure drops, without excessive energy consumption or equipment wear. Such an approach enhances the effectiveness of the flow control system and reduces operational costs while maintaining high control accuracy.
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Materials for aggressive fluidsA wide range of construction materials for aggressive fluids allows for the valve's precise adaptation to the most challenging operating conditions. Depending on the composition of the working medium and the requirements of the technological process, the body and main components can be manufactured from stainless steel, alloy steel, heat-resistant steel, and corrosion-resistant alloys, as well as bronze for oxygen service. This variety of materials guarantees resistance to corrosion, erosion, and chemical impact, maintaining the valve's reliability and durability in aggressive media.
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Wide selection of seatsThis allows for precise adaptation of the valve to specific process parameters. The availability of seats with different orifice diameters ensures an optimal rangeability and stable operation under any pressure drops. This solution enhances valve versatility, simplifies equipment selection, and allows for the use of a single body size for various operating conditions.
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Quick change seatThe use of a quick change seat enables on-site inspection and servicing of the valve's trim without the need to remove the valve from the pipeline. This design significantly minimizes equipment downtime, streamlines maintenance procedures, and reduces operational expenses. The ability to quickly replace the seat ensures the valve's continued tightness and reliability, even under intensive operation.