Durable Y Type Boiler Blow-Down Valves for High Pressure Applications

• Customization: Available
• Media: Gas
• Temperature: High Temperature
• Model NO.: SERIES DRAIN VALVE
• Actuator: Manual
• Material: Carbon Steel
• Structure: Through Way Globe Valve
• Sealing Form: Gland Packings Globe Valve
• Stem Thread Position: Outside Screw Stem Globe Valve
• Standard: DIN, GB, ANSI, JIS
• Type: Through Way Type/Angle Type/Series Type and Y Type
• Specifications: DN20/DN25/DN40/DN50/DN65/DN80
• Nominal Pressure: ANSI150-ANSI2500
• Rated Stroke: 25405060 mm
• Fluid Temperature: -20ºC~566ºC
• Connection Type: Sw, Bw, Flanged
• Flow Control: Continuous Flow Control Conditions
• Flow Control Way: Continuous Flow Control Conditions
• Leakage Class: 0 Leakage (API598)
• Materials: Carbon Steel/Alloy Steel/Stainless Steel
• Forging Mode: Standard Connection: Sw/Optional Connection: Bw or
• Casting Mode 1: ANSI900 and Below Use Flange Connections
• Casting Mode 2: ANSI1500 and Above Are Butt Welded Connections
• Casting Mode 3: Cap of Angle and Straight Through Body: Bolted
• Transport Package: Wooden
• Trademark: SNT
• Origin: China
• HS Code: 8481804090
• Production Capacity: 500000PCS/Year

Product Description

Standard Mat.Comparison

 

 

^No.	^Part name	^Standard material		^No.	^Part name	^Standard material
		^<ANSI 900	^>=ANS|1500			^<ANSI900	^>=ANSI 1500
^1	^Valve body	^A105N	^A105N	^83	^Screw holder	^HBsc2	^HBsc2
^2	^Top cover	^A105N	^A105N	^85	^Flat head round key	^Carbon steel	^Carbon steel
^3	^Body screw	^A193-B7 Colored zinc plating	^A193-B7 Colored zinc plating	^86	^Lock nut	^Carbon steel + galvanized	^Carbon steel + galvanized
^4	^Body nut	^A194-2H Colored zinc plating	^A194-2H Color zinc plating	^87	^Hex socket screws	^304SS	^304SS
^5	^Valve core	^A276410+HF	^316+S503+S505	^88	^Nameplate	^304SS	^304SS
^6	^Valve seat	^A276410+HF	^316+ZY08	^89	^Connecting flange	^Carbon steel	^Carbon steel
^8	^Wrap shims	^304+GRAPHITE	^304+GRAPHITE	^90	^Limit anti-turn block	^Carbon steel + galvanized	^Carbon steel + galvanized
^9	^Sleeve	^440C+HF	^316+S101	^91	^Nuts	^Carbon steel + galvanized	^Carbon steel + galvanized
^14	^Wrap shims	^304+GRAPHITE	^304+GRAPHITE	^92	^Thrust needle roller bearings	^Bearing steel (standard material	^Bearing steel (standard material
^17	^Packing plate	^A351 CF8	^A351 CF8	^93	^Hex set screws	^304SS	^304SS
^23	^Nuts	^A194-2H	^A194-2H	^252	^Packing gland	^A276410	^A276410
^24	^Screw	^A193-B7	^A193-B7	^255	^Packing assembly	^Flexible graphite	^Flexible graphite
^80	^Support stand pole	^Carbon steel + galvanized	^Carbon steel + galvanized	^257	^Packing pad	^A276410	^A276410
^81	^Hex head bolts	^304SS	^304SS	^572	^Handwheel	^Carbon steel	^Carbon steel

About SNT Blow-down Valves

SNT Machinery (Qingdao) Co., Ltd. (commonly known as SNT) stands as a beacon of innovation in the world of valve manufacturing, expertly crafting solutions that elevate the science and art of fluid flow and valve technology. With a deep commitment to quality and precision, SNT specializes in the intricate development, cutting-edge design, and production of superior valve technologies that meet the demands of diverse industries.

SNT Imagine a valve that excels in continuous throttling control for complex applications such as boiler continuous drainage, sampling from high-pressure vessels and reactors, and high-pressure discharge! The SNT drain valve is engineered to thrive in such environments, including boiler feed pump bypass system releases, high-pressure difference scenarios, and heater drains leading to condensers, even in the face of corrosion and high-flow-rate challenges. Unyielding and robust, the SNT valve surpasses traditional valve designs with enhanced durability, making it perfectly suited for continuous drain conditions that typically wreak havoc on standard valves. Traditional cutoff drain and venturi valves simply cannot compare to the strength of our meticulously crafted solutions.

The SNT drain valve redefines the boundaries of conventional internal structure design. With a seamless flow channel crafted between the valve core and cylindrical valve seat, fluid dynamics are taken to new heights, accelerating fluid flow until it reaches the expanded downstream of the valve seat. This design innovation creates a dramatic pressure drop at the flow channel's center, sparking rapid fluid expansion and the onset of turbulence. In this efficient discharge process, fluid transformation into steam occurs at supersaturation, simultaneously cooling the remaining liquid-an exemplary utilization of flash evaporation within liquid flow dynamics.

To cater to a spectrum of industrial needs, we offer valve production across an impressive pressure range from ANSI 150 to ANSI 2500. Our standard stop valve sizes include 3/4" (DN20), 1" (DN25), 1.1/2" (DN40), 2" (DN50), 2-1/2" (DN65), and 3" (DN80). The hallmark of SNT valve design is its angular connection, which promotes uniform fluid flow. For those requiring alternatives, through-way type stop valves are available. Whether manual, pneumatic, or electric control is desired, each valve offers precise throttling control. Our sophisticated SNT internal design, verified via computative Fluid Dynamics using the Fluent-Code, ensures precise flow evaluation and pressure drop analysis. All SNT internals boast surface hardening with premium Co-Ni based alloys or Cr-N ceramic coatings, providing unparalleled protection against abrasion and corrosion under high-pressure drops and rapid flow rates.



 

Product Description

SNT - SERIES DRAIN VALVE
3/4"(DN20)~3"(DN80)ANSI Class 150~1500
 

^Applications		^-Steam boiler, evaporator and other boiler water continuous drain control-Flow and pressure regulation and flash application-Steam boiler, evaporator and other boiler water intermittent drain control		^Manual operation control
^Nominal pressure		^ANSI 150, 300, 600, 900, 1500		^Pressure class >=ANSI1500 for RT test
^Nominal diameter	^Forging mode	^3/4 "(DN20), 1"(DN25) and 1.1/2 "(DN40), 2"(DN50)		^ANSI 150, 300, 600, 900, 1500
	^Casting mode	^2.1/2"(DN65), 3"(DN80)		^ANSI 150,300, 600, 900, 1500
^Connection mode	^Forging mode	^-Standard connection: SW-Optional connection: BW or flanged
	^Casting mode	^-ANSI 900 and below with flange connections-ANSI1500 and above are butt welded- Cap of Angle body: bolted connection		^Metal self-sealing structure form for option
^Design calculation		^-Angular connection- Under the condition of high pressure difference, two or more Angle valves are used for fluid pressure precise control-The size of the seat hole is calculated by strict design-Verified by CFD analysis and testing- Compound hole plate can be configured for actual high pressure difference conditions- Suitable for forging, casting, bar stock- Heat treatment of valve internalsValve core: surface hardening or nit riding treatmentSeat: Nit riding or surfacing with STL alloy		^Other hole types: Conical hole/labyrinth runnerSurface hardening: surfacing STELLITE Gr.6Surface hardening of seat: Other options
^Material		^-Carbon steel- Alloy steel- Stainless steel High quality Alloy steel	^A105N, A182-F22A182-F304(L),A182-F316(L)As required by customer

 

<sup>Notes:
1. S101 Hard Surface Technical Description: This state-of-the-art surface finish boasts a hardness rating of HRC≥55, ensuring a robust metallurgical bond that is resistant to detachment, providing longevity and reliability.
2. S503 Hard Surface Technical Description: Featuring a thickness of 1.5mm and a hardness of HRC≥55, this surface is bound with a force of 400MPa, designed to maintain its integrity under pressure without flaking.
3. S505 Hard Surface Technical Description: With an ultra-thin thickness of just 0.3mm and a superior hardness of HRC≥65, this surface is engineered to withstand binding forces of ≥250MPa, ensuring exceptional durability.</sup>



Rated Flow Coefficient Comparison Table



Application of Typical Working Conditions
 

^{As shown in the figure on the left, according to ASME B31.1 Power Boilers and Piping, intermittent drain valves are crucial for Zone 2 applications, directly integrated into boiler or boiler piping. Additionally, continuous drain valves, traps, and safety valves play vital roles.}

<sup>According to §122.1.4 of ASME B31.1 Power Boilers and Piping, the piping is customarily equipped with two valves in series: a Y-type intermittent drain valve and an emergency stop valve.

This intermittent drain valve features a lever-type rapid discharge mechanism, enabling swift opening and closing. When engaged, the valve swiftly expels sediment, dirt, and particles from the boiler's base, completing the process in under 3 seconds to prevent the wastage of boiler water. Its flow channel is streamlined, akin to straight piping.

The emergency stop valve ensures a tight seal of the pipeline, safeguarding resources in the event of a malfunction of the preceding intermittent drain valve.</sup>

Conditions&Solutions

Pressure and Temperature Parameters: Designed to thrive under exacting standards, our Y Type Boiler Blow-down Valves are built to withstand extreme pressures and temperatures in ANSI150 settings. These parameters are meticulously engineered to offer exceptional performance, ensuring your system runs smoothly with maximum efficiency and minimal downtime.

SNT Valve Advantages

 

^{1. SNT Machinery (Qingdao) Co., Ltd. epitomizes the ideal fusion of design, development, production, and sales, offering a comprehensive service approach as a trade-oriented enterprise.}

<sup>2. Experience unparalleled quality, competitive pricing, and exemplary service delivered by our team of seasoned professionals, who employ innovative solutions to tackle any challenge.
3. Manufacturing Excellence: We hold Special Equipment Type Test Certificates.</sup>

^{4. Our company adheres to the stringent requirements of ISO9001 and API SPECQ, implementing essential control methods and processes. We ensure our equipment, including inspection and testing devices, is primed for excellence. This guarantees the design, manufacturing, and service processes achieve full compatibility and completeness with the entire system.}

<sup>5. Our cutting-edge research and development team boasts a portfolio of nearly 100 patents, underscoring our commitment to innovation and product excellence.
6. SNT is a pioneering enterprise, specializing in providing integrated solutions for control valves and their associated actuators. Our expertise spans across multiple sectors such as Petroleum, Chemical, Power Generation, Storage Tank Management, Air Separation, Coal Chemical Processing, and the Liquefied Natural Gas Industry.</sup>

 

Production application

 

 

Company Profile