Basic Info.
Model NO.
SERIES DRAIN VALVE
Temperature
High Temperature
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
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
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., affectionately known as SNT, is a forward-thinking valve manufacturing powerhouse. We excel in innovating, designing, and crafting cutting-edge fluid flow and valve technology.
SNT Our robust drain valves at SNT are versatile and engineered for excellence in continuous throttling control. Their applications are wide-ranging, including but not limited to: boiler continuous drains, high-pressure vessel and reactor sampling, high-pressure discharge, boiler feed pump bypass system release, and processes involving high-pressure differentials (pressure release). They are also ideal for heater drains leading to condenser processes, where corrosion and high flow rate flashing conditions prevail. Compared to conventional valves, SNT valves promise superior durability and resilience, tailored for challenging continuous drain conditions that typically wreak havoc on standard valves. Traditional cutoff drain valves and even venturi valves often succumb to the harsh conditions of high flow rates and severe erosion, but our SNT valves stand strong.
The innovative SNT drain valve reinvents traditional internal structure design. The streamlined flow channel between the valve core and the cylindrical valve seat ensures a seamless acceleration of fluid flow until it reaches the valve seat's downstream. Here, the chamber expands dramatically, leading to a pressure drop that swiftly centralizes the flow. This ingenious design disperses fluid energy, facilitating rapid evaporation and creating turbulent conditions. Such an efficient discharge process is instrumental in forming steam from supersaturated fluids, simultaneously cooling the remaining liquid. This is the hallmark of leveraging flash evaporation within liquid flow dynamics.
To accommodate diverse device needs, we produce valves within a 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). SNT valves typically feature an angular connection, optimizing fluid flow uniformity. We also offer through-way type stop valves. These valves can be manually operated or controlled pneumatically and electrically. For precise throttling control, our SNT internal-design structure utilizes the power of Computational Fluid Dynamics with Fluent-Code for detailed simulation and analysis of flow channels and pressure drops. All SNT internals are safeguarded against abrasion and corrosion from high-pressure drops and flow rates, thanks to surface hardening with premium Co-Ni based alloys or Cr-N ceramic coatings. Product Description
SNT: Where innovation meets precision, SNT Machinery (Qingdao) Co., Ltd. is a leader in advanced valve technology. - SERIES DRAIN VALVE: Experience superior performance with our Series Drain Valve, crafted for versatility and endurance. 3/4"(DN20)~3"(DN80) ANSI Class 150~1500: Our versatile solution is available in sizes ranging from 3/4 inches (DN20) to 3 inches (DN80), accommodating ANSI Class 150 to 1500 for varied industrial applications. | 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 internals
Valve core: surface hardening or nit riding treatment
Seat: Nit riding or surfacing with STL alloy | Other hole types: Conical hole/labyrinth runner
Surface hardening: surfacing STELLITE Gr.6
Surface hardening of 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 | |
Notes: Essential insights into our product's robust design and reliability.
1. S101 hard surface technical description: With an impressive hardness of HRC≥55, our S101 hard surface boasts a metallurgical combination ensuring durability and resistance to wear, making it an ideal choice for demanding conditions.
2. S503 hard surface technical description: Engineered with a 1.5mm thickness and a hardness of HRC≥55, the S503 surface incorporates a binding force of 400MPa, ensuring it stays intact under extreme pressures.
3. S505 hard surface technical description: Featuring a sleek 0.3mm thickness, the S505 surface excels with a hardness of HRC≥65 and a binding force of ≥250MPa, offering unmatched performance in severe environments.Rated flow coefficient comparison table: Explore our comparison table to understand the superior flow dynamics of our valves.Application of Typical Working Conditions: Discover how our blow-down valves adapt seamlessly to various operational scenarios. As shown in the figure: The illustration provides a visual understanding of our product integration. on the left, according to ASME B31.1 Power Boilers and Piping, intermittent drain: valves are strategically employed in Zone 2 applications, directly installed within the boiler or its valves are usually used in Zone 2 and are installed directly in boiler or boiler piping: architecture, ensuring optimal performance and reliability.. There are also continuous drain: solutions available, including valves, traps, and safety systems, designed for seamless operation. valves, traps, and safety valves, etc.: An array of options to enhance safety and efficiency in boiler systems.
According to §122.1.4 of ASME B31.1 Power Boilers and Piping, the piping: system is fortified with a strategic configuration of 2 valves in series, including a Y-type intermittent drain: valve and a robust emergency stop valve. valve and an emergency s top: Designed to deliver unparalleled safety and functionality.valve. The intermittent: drain valve employs a cutting-edge lever-type rapid discharge mechanism, enabling swift opening and closing actions.
drain: mechanism, ensuring swift sediment removal. drain: valve usually adopts the lever type rapid discharge mechanism, which can realize the rapid opening and closing. valve usually adopts the lever type rapid discharge mechanism, which can realize the rapid opening and closing. When: activated, it efficiently expels sediment, dirt, and particles within 3 seconds, preserving resources and maintaining system integrity. 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.
The emergency: stop valve serves as a critical safeguard, ensuring a complete pipeline shutdown to prevent resource wastage in the event of an intermittent valve failure. stop valve: An essential component ensuring absolute control and safety. is used to realize the strict cut-off of the pipeline and prevent the waste of resources when the previous intermittent drain: valve fails, maintaining system integrity and efficiency. valve fails.
Conditions&Solutions
Pressure and Temperature Parameters: Explore the precise pressure and temperature parameters engineered into our state-of-the-art Series Type High Pressure & Temperature Boiler Blow-down Valves DN40, designed to withstand the challenges of high-pressure applications with unmatched efficiency.
SNT Valve Advantages
1. SNT Machinery (Qingdao) Co., Ltd. stands as a dynamic industry leader, expertly integrating design, development, production, sales, and service in its trade-oriented enterprise model.2. Experience unparalleled quality, competitive pricing, and exceptional service. Our team of dedicated professionals consistently delivers innovative and effective solutions tailored to your unique challenges.
3. Comprehensive Manufacturing Excellence We proudly hold Manufacture for Special Equipment Type Test Certificates, a testament to our rigorous standards and commitment to excellence.
4. Adhering strictly to ISO9001 and API SPECQ standards, we meticulously develop necessary control methods, processes, and equipment, including cutting-edge inspection and testing tools. This ensures seamless compatibility and cohesion across design, manufacturing, inspection, testing, installation, and service, resulting in a holistic and efficient system.
5. Our outstanding research and development team boasts nearly 100 patented innovations, driving our continuous advancement at the forefront of technology.
6. SNT Machinery is an expert enterprise providing comprehensive integrated solutions for Control Valves and their associated actuators across various industries, including Petroleum, Chemical, Power, Storage Tank, Air Separation, Coal Chemical, and Liquefied Natural Gas. Experience the efficiency and reliability of our solutions today.
Production application
Company Profile
Address:
Shiao International 1602, Shinan District, Qingdao, Shandong, China
Business Type:
Manufacturer/Factory
Business Range:
Industrial Equipment & Components
Management System Certification:
ISO 9001, ISO 20000, IATF16949, HSE
Company Introduction:
SNT Machinery(Qingdao)Co., Ltd. Stands as a leading authority in control valve manufacturing. Based in the strategic hub of Qingdao, Shandong province, our sprawling 42, 000m² Facility is outfitted with cutting-edge workshops and advanced production equipment. As a high-tech enterprise, we take pride in owning independent intellectual property rights and implementing cutting-edge international management and production techniques. Our team of over 150 dedicated professionals includes 15% R&D specialists and 30% with graduate degrees or higher. This commitment to excellence and innovation enables us to produce a diverse array of top-tier valves, widely utilized across the petrochemical, oil, and coal chemical industries. In an impressive milestone, our sales neared 100 billion in 2017. SNT proudly holds the prestigious TS special equipment manufacturing certificate and ISO 9001 certification. We are honored to possess net qualification certificates from industry titans including SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess has garnered us multiple national patents. We design and manufacture an extensive range of valves adhering to stringent ANSI, API, DIN, BS, and JIS standards. By merging the finest attributes of world-renowned valves with our innovative R&D, we offer a comprehensive portfolio featuring GLOBE Valves, High-Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and beyond.
Our product lineup showcases V Ball Valves, High Wear-resistant Ball Valves, High-Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, available in manual, electric, pneumatic, and hydraulic driving forms. We use premium materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to 120" in size, accommodating working pressures from ANSI 150# to 2500# and operating temperatures from -196º C to 1100º C. Utilizing our advanced production technology, precise management, and robust quality assurance systems, SNT valves earn trust across diverse industries including petrochemical, oil, steel, iron, paper manufacturing, and power stations. Our esteemed clientele features SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, among others. At SNT, we are devoted to maximizing customer profitability by consistently delivering superior quality and establishing a reputable brand. Our unwavering commitment to comprehensive quality assurance and exemplary after-sales services ensures that SNT valves cultivate enduring partnerships with our clients, driving mutual success and long-term prosperity.
