Pneumatic Y-shaped Drain Valve J665Y-900LB-1500LB

The pneumatic Y-shaped drain valve is particularly suitable for use in thermal power plant systems (main steam system drainage in thermal power plant systems) as a medium for connecting or cutting off. The upper part of the pneumatic Y-shaped drain valve is composed of a valve cover and a packing box, which is conducive to quick disassembly and on-site maintenance. The construction of the inclined valve stem and the optimal design of the flow channel shape make the medium close to a straight line, and the valve has the best Cv value, producing lower pressure drop than other forms of valves. The valve body is welded with a special process of hard alloy sealing surface (the sealing surface is treated with overall hardening), making the structure more compact. The conical sealing surface design allows for sealing with minimal axial force, providing reliable sealing and a long service life. The valve disc guided by the middle chamber of the valve body has two guide rings, upper and lower. The top and bottom of the valve disc are guided simultaneously, forming a piston type valve disc that is guided throughout the middle chamber of the valve body. This can eliminate phenomena such as jamming, surface abrasion, valve stem bending, and valve disc vibration caused by various improper forces. The guide ring at the bottom of the valve disc passes 90% of the fluid in a nearly straight line, effectively eliminating all adverse reactions caused by side impacts. These characteristics make this valve very suitable for rapid steam discharge and drainage systems in power plants. The sealing surface of the valve disc is welded with hard alloy, which has excellent mechanical properties, wear resistance, erosion resistance, and can maintain the long-term service life of the valve. The valve stem packing adopts imported special packing, which can achieve the best leak proof effect, and is durable and easy to disassemble. The sealing between the packing box and the valve body adopts a 316 high mesh flexible graphite gasket, which is assembled with a predetermined torque, safe and reliable, and prevents external leakage.

Structural characteristics of pneumatic Y-shaped drain valve

1. The DC valve core is hidden in the valve chamber, and after opening, the flushing force of the medium is reduced, resulting in a long service life
2. The upper part of the pneumatic Y-shaped drain valve is composed of a valve cover and a packing box, which is conducive to quick disassembly and on-site maintenance.
3. The construction of the inclined valve stem and the optimal design of the flow channel shape make the medium close to a straight line, and the valve has the best Cv value, producing lower pressure drop than other forms of valves.
4. Special process welding of hard alloy sealing surface (the sealing surface undergoes overall hardening treatment), with a long service life.
5. The use of pneumatic devices as actuators ensures precise, safe, and effective control of valves.
6. The packing box adopts a special structural design to ensure sufficient strength and good thermal properties.

Executive standard for pneumatic Y-shaped drain valve
Design and manufacturing standards: JB/T3595, E101, ANSI B16.34
Structural length standard: GB/T 12221-2005
Pressure and temperature rating: GB/T 12224-2005
Design standards: API 602, ASME B16.34, BS 1873
Connection standards: ASME B1.1, ASME B16.11, ASME B16.25

Performance parameters of pneumatic Y-shaped drain valve
Nominal diameter: DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100
Flow coefficient (CV): 5 8 12 17 29 43 70 100
Rated stroke: 16 25 40
Effective area of membrane: 280 400 600
Nominal pressure: 150LB (2.0MPa) -1500LB (25.0MPa)
Working temperature: ≤ 570 ℃
Signal range: 20-100 40-200
Origin pressure (MPa): 0.14-0.04
Permissible leakage: less than level VI

Pneumatic Y-shaped drain valve external connection size