SNT: Your trusted partner in delivering innovative and high-quality valve solutions. - Y-TYPE THROUGH DRAIN VALVE: Designed for efficiency and reliability in managing high-pressure and temperature conditions.
1"3/4 (DN20) ~ 3" (DN80) ANSI Class 150 ~ 1500: Available in a wide range of sizes and pressure classes to meet diverse application needs.
| Applications |
Steam boiler, evaporator and other boiler water intermittent drain control |
Manual operation control |
| Nominal pressure |
ANSI 150, 300, 600, 900, 1500 |
>=ANSI1500 RT
Pressure class >=ANSI1500 for RT test |
| Nominal diameter |
Forging mode |
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 |
Pair flanges for option: flat welded flange
Butt welded flange |
| Casting mode |
-ANSI900
-ANSI1500
-ANSI900 and below are connected with flanges
-ANSI1500 and above are butt welded
- Cap of Angle body: bolted connection |
| Design calculation |
-Y-type stop valve
-CFD
- 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 and casting
-Heat treatment of valve internals
Valve core: surface hardening or nitriding treatment
Seat: nitriding or surfacing with STL alloy |
Replace seat and core quickly
:STELLITE Gr.6
Surface hardening: surfacing STELLITE Gr.6
Surface hardening of the seat; Other options |
| Material |
-Carbon steel
-Alloy steel
-Stainless steel
-High quality Alloy steel |
A105N
A182-F22
A182-F304(L
A182-F316(L)
As required by customer |
|
Flow control |
Intermittent flow control condition |
Manual control |
STANDARD MATERIAL COMPARISON SHEET: Providing a comprehensive overview of the premium materials used, tailored for optimal performance.
| 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 |
Notes: Important technical specifications and details to ensure effective application and maintenance of the product.
1. S101 Hard Surface Technical Description: A tough surface with HRC≥55, offering a metallurgical bond that resists wear and prevents flaking.
2. S503 Hard Surface Technical Description: Featuring a 1.5mm thickness and a hardness of HRC≥55, with a binding force of 400MPa to ensure durability and adherence.
3. S505 Hard Surface Technical Description: At a thickness of 0.3mm and with hardness HRC≥65, it offers a robust binding force of ≥250MPa for exceptional performance.
About SNT Blow-down Valves
SNT Machinery (Qingdao) Co., Ltd., fondly known as SNT, stands as a beacon of innovation in valve manufacturing. Driven by a passion for fluid flow and valve technology, SNT excels in the development, design, and production of high-quality valves that set industry standards.
SNT Experience the wide-ranging utility of our drain valves, masterfully crafted for continuous throttling control across a multitude of applications. Be it boiler continuous drain, high-pressure vessel and reactor sampling, or boiler feed pump bypass systems, SNT valves are designed for unparalleled durability and robustness. These valves seamlessly handle high-pressure differences and withstand the challenges of corrosion and high-flow rate flash conditions that typically damage traditional valves. Unlike the vulnerable traditional cutoff and venturi valves, SNT valves are the epitome of resilience, ensuring long-lasting performance in demanding continuous drain conditions.
The SNT drain valve revolutionizes traditional valve design philosophies with its innovative internal structure. Featuring a smooth-flow channel between the valve core and cylindrical seat, our valve accelerates fluid flow efficiently. As the fluid journeys downstream, into a larger chamber, the pressure drop at the center initiates a dynamic expansion towards the flow center, facilitating a rapid energy dispersion and evaporation. This sophisticated discharge process not only generates steam from supersaturated fluids but also cools any remaining liquid, exemplifying the practical application of flash evaporation in liquid flow.
To cater to the diverse requirements of various systems, we offer valves within the expansive pressure range of ANSI 150 to ANSI 2500. Our standard valve sizes include 3/4" (DN20), 1" (DN25), 1.1/2" (DN40), 2" (DN50), 2-1/2" (DN65), and 3" (DN80). The quintessential SNT valve design features an angular connection, promoting a uniform flow of fluid. For more diverse applications, through-way type stop valves are also an option. Control options are versatile, encompassing manual, pneumatic, and electric modes. To achieve precise throttling control, our SNT valves utilize cutting-edge computational fluid dynamics (CFD) simulations, employing Fluent-Code for flow channel analysis and pressure drop evaluation. In addition, all SNT internals boast surface-hardening with premium Co-Ni based alloys or are treated with Cr-N ceramic coatings, providing exceptional resistance to abrasion and corrosion under high-pressure conditions.
Rated Flow Coefficient Comparison Table: Compare and analyze the rated flow coefficients with our comprehensive table, tailored for precision and effectiveness in high-pressure environments.
Application of Typical Working Conditions: Explore the typical working conditions suited for our high-performance valve, engineered to excel under the most demanding circumstances.
As shown in the figure: Examine the detailed illustration on the left, according to ASME B31.1 Power Boilers and Piping, intermittent: In alignment with ASME B31.1 standards for Power Boilers and Piping, observe how intermittent drain: drainage solutions are implemented valves are usually used in Zone 2 and are installed directly in boiler or boiler: These valves are typically utilized in Zone 2, directly installed in boilers or their corresponding piping: piping systems.. There are also continuous drain: drain mechanisms, including valves, traps, and safety valves, etc.: continuous drain valves, traps, safety valves, among others.
According to §122.1.4 of ASME B31.1 Power Boilers and Piping, the: As per §122.1.4 of the ASME B31.1 Power Boilers and Piping guidelines, ensure the piping: piping is equipped is usually fitted with 2 valves in series, a Y-type intermittent: with two valves in sequence, featuring a Y-type intermittent drain: drain valve alongside valve and an emergency s: an emergency stoptop: top valve for valve: enhanced security.
The intermittent: This intermittent drain: drain valve employs valve usually adopts the lever type rapid discharge mechanism, which can realize the rapid opening and closing: a lever-type rapid discharge mechanism, facilitating swift opening and closing for efficiency. When the valve is opened, the sediment, dirt and other particles at the bottom of the boiler can be discharged quickly, no more than 3S. If the time is too long, a large amount of boiler water will be discharged, resulting in a great waste of resources. The flow channel is close to the straight pipeline: Upon activation, swiftly expel sediment, dirt, and particles from the boiler base in under 3 seconds. Extended duration leads to excessive water discharge, causing resource wastage. The flow follows a near-straight pipeline.
The emergency: Our emergency stop valve: stop valve is pivotal is used to realize the strict cut-off of the pipeline and prevent the waste of resources when the previous intermittent: for strict pipeline cut-off, preventing resource wastage when the prior intermittent drain: drain valve is valve fails: inefficient.
Pressure and Temperature Parameters: The Y Type High Pressure & Temperature Boiler Blow-down Valve DN50 is meticulously engineered to withstand extreme conditions, offering unparalleled reliability. With precise pressure and temperature parameters, this valve assures robust performance and safety in demanding environments, maintaining stability and efficiency.
SNT Ball Valves are meticulously crafted to meet and exceed a comprehensive array of international standards, including ASME B16.34-2009, ASME B16.10-2000, and API 589-2009. This sophisticated series is adopted extensively across multiple industries: petroleum, chemical processing, light manufacturing, pharmaceuticals, paper production, metallurgy, and power generation.
Their Remarkable Features Include:
Streamlined design for effortless assembly and disassembly.
Engineered with maintenance in mind, our ball valves feature a non-tight fit design that simplifies servicing, thereby reducing downtime during regular maintenance intervals.
Revolutionary sealing technology for unparalleled safety and security.
The multi-layer sealing system of stem and body provides dual defense using a combination of O-ring and graphite or PTFE, ensuring superior sealing performance.
This pioneering design conforms to the stringent TA-Luft/Shell SPE 77/312 standards.
Prolonged Service Life for Exceptional Cost-Efficiency
Our metal seated ball valves undergo state-of-the-art processing techniques, including spray welding, spraying, and fusion welding. This results in a hardness range of HRC58-73 and a binding force of 80-40MPa. They boast an impressive on-off cycle lifespan exceeding 100,000 operations and achieve a leakage class of ANSI VI.
Innovative Modular Design for Enhanced User Experience
The modular inner sealing design allows for seamless interchangeability between soft and metal seats, guaranteeing flexibility and reliability.
Various Connection Types for Optimal User Convenience
Our valves offer a variety of connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW. All types adhere to international standards, ensuring seamless and user-friendly installation and integration.
Vast Application Experience Ensures Unwavering Reliability
SNT Valves have built an impeccable reputation through widespread usage in the petroleum, chemical processing, light manufacturing, pharmaceuticals, paper production, metallurgy, and power generation industries. We provide tailored solutions custom-fit to specific service conditions, ensuring industry-leading reliability and performance.
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