Basic Info.
Model NO.
SERIES DRAIN VALVE
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
Introducing SNT Machinery (Qingdao) Co., Ltd., affectionately known as SNT, a distinguished valve manufacturing powerhouse. We specialize in the meticulous development, innovative design, and proficient production of advanced fluid flow and cutting-edge valve technology.
SNT Our revolutionary drain valves by SNT are engineered for superior performance in continuous throttling control applications. They are versatile enough for use in critical functions such as boiler continuous drain, high-pressure vessel and reactor sampling, high-pressure discharge, boiler feed pump bypass system release, and heater drain to condenser processes. Designed to withstand the challenges posed by high flow rates and severe corrosion, these robust and durable valves outperform traditional counterparts, including the fragile cutoff and venturi valves.
The pioneering SNT drain valve redefines the conventional internal structure design. It features a streamlined flow channel between the valve core and cylindrical seat, accelerating fluid dynamics until it reaches downstream, where the chamber enlarges. This design induces a significant pressure drop that facilitates rapid fluid expansion, leading to energy dispersion and evaporation, creating turbulence. The efficient flow discharge ensures steam formation in supersaturated conditions while thermally managing residual liquids through flash evaporation.
To cater to diverse operational requirements, SNT offers an impressive range of valves in the ANSI pressure spectrum from 150 to ANSI 2500. The standard stop valve sizes available are 3/4" (DN20), 1" (DN25), 1.1/2" (DN40), 2" (DN50), 2-1/2" (DN65), and 3" (DN80). SNT valves predominantly feature an angular connection to facilitate seamless fluid dynamics. The through way type stop valves are versatile in control options, including manual, pneumatic, and electric modes. For precision throttling, we utilize computational Fluid Dynamics with Fluent-Code to simulate and analyze flow channels and pressure differentials. Our internals are fortified with high-quality Co-Ni alloy surface treatments or Cr-N ceramic coatings to resist abrasion and corrosion under extreme pressure and flow conditions. Product Description
SNT: A legacy of excellence and innovation in precision engineering. - SERIES DRAIN VALVE: Elevate your expectations with our drain valves, characterized by superior durability and reliability. 3/4"(DN20)~3"(DN80) ANSI Class 150~1500: Spanning a versatile range, our valves are meticulously engineered to meet diverse industry standards, ensuring exceptional performance across 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: Critical insights into our advanced surface technology and valve design.
1. S101 hard surface technical description: Experience durability with HRC≥55 hardness, metallurgical bonding guarantees longevity and resistance to peeling.
2. S503 hard surface technical description: Precision crafted with a thickness of 1.5mm, a robust hardness of HRC≥55, and a binding force of 400MPa, ensuring steadfast performance.
3. S505 hard surface technical description: Ultra-thin design with 0.3mm thickness, remarkable hardness of HRC≥65, and a binding force of ≥250MPa, engineered for superior resilience.Rated flow coefficient comparison table: Comprehensive data at your fingertips for informed decision-making.Application of Typical Working Conditions: Adaptability redefined for a wide spectrum of operational scenarios. As shown in the figure on the left, according to ASME B31.1 Power Boilers and Piping, intermittent drain valves are usually used in Zone 2 and are installed directly in boiler or boiler piping. There are also continuous drain valves, traps, and safety valves, etc. Elegantly engineered for precision and safety in demanding environments.
According to §122.1.4 of ASME B31.1 Power Boilers and Piping, the piping is usually fitted with 2 valves in series, a Y-type intermittent drain valve and an emergency stop valve. A dual-valve system ensures enhanced safety and operational efficiency.
The intermittent drain valve usually adopts the lever type rapid discharge mechanism, which can realize the rapid opening and closing. Designed for swift and efficient discharge of impurities. 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. Precision-engineered for optimal resource conservation and efficiency.
The emergency stop valve is used to realize the strict cut-off of the pipeline and prevent the waste of resources when the previous intermittent drain valve fails. Ensuring absolute reliability and control within critical systems.
Conditions&Solutions
Pressure and Temperature Parameters: Unveiling Excellence in Precision and Performance
SNT Valve Advantages
1. SNT Machinery (Qingdao) Co., Ltd. is a dynamic enterprise that seamlessly integrates design, development, production, sales, and service, offering an industry-leading approach that is both commerce and trade-oriented.2. Experience superior quality, competitive pricing, and exceptional service provided by a team of professional workers dedicated to innovatively solving challenges.
3. Proudly producing equipment that earns Special Equipment Type Test Certificates, ensuring top-tier manufacturing standards.
4. In strict accordance with ISO9001 and API SPECQ standards, SNT meticulously determines and prepares essential control methods, processes, and equipment, including rigorous inspection and testing tools. We ensure that design, manufacturing, inspection, testing, installation, and service processes are fully compatible and complete throughout the system.
5. Benefit from our exceptional research and development team, boasting nearly 100 patents, demonstrating our commitment to innovation and quality.
6. SNT is a premier enterprise specializing in providing comprehensive, integrated solutions for control valves and their associated actuators, serving diverse industries such as Petroleum, Chemical, Power, Storage Tank, Air Separation, Coal Chemical, and Liquefied Natural Gas.
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.