Basic Info.
Model NO.
Y-Type Through Way Drain Valve
Temperature
High Temperature
Structure
Through Way Globe Valve
Sealing Form
Gland Packings Globe Valve
Stem Thread Position
Outside Screw Stem Globe Valve
Application
Lining Fluorine Valve, Needle Type Globe Valve, Cryogenic Globe Valve, Plunger Type Globe Valve, Heat Preservation Globe Valve, Forged Steel Globe Valve, Oxygen Globe Valve, Bellows 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-ANSI1500
Rated Stroke
25/40/50/60 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
3/4"(DN20) 1"(DN25) /1.1/2"(DN40) 2"(DN50)
Casting Mode 1
ANSI900 and Below Are Connected with Flanges
Casting Mode 2
ANSI1500 and Above Are Butt Welded
Casting Mode 3
Cap of Angle Body: Bolted Connection
Casting Mode
2.1/2"(DN65)/3"(DN80)
Product Description
Standard Mat.Comparison
SNT - Y-TYPE THROUGH DRAIN VALVE1"3/4(DN20)~3"(DN80)ANSI Class 150~1500| 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 SHEE| 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 |
1.S101 hard surface technical description: HRC≥55, metallurgical combination, not easy to fall out;
2.S503 hard surface technical description: thickness 1.5mm, hardness HRC≥55, binding force 400MPa, not easy to fall out;
3.S505 hard surface technical description: thickness 0.3mm, hardness HRC≥65, binding force ≥250MPa;About SNT Blow-down Valves
SNT Machinery(Qingdao) Co., Ltd. (referred to as SNT) is a valve manufacturing company that specialized in the development, design and production of fluid flow and valve technology.
SNT drain valve can be widely used in continuous throttling control, such as: boiler continuous drain, high pressure vessel and reactor sampling, high pressure discharge, boiler feed pump bypass system release device, high pressure difference (pressure release) conditions, heater drain to the condenser process due to corrosion and high flow rate flash conditions. Compared with the traditional valve, the SNT valve is more robust and durable, which is suitable for continuous drain conditions that can cause serious damage to the valve. Because in the continuous drain working condition, the flow rate is high, the erosion is more serious, the traditional cutoff drain valve is fragile, even the venturi valve is also fragile.
The SNT drain valve breaks the traditional internal structure design concept. The flow channel between the valve core and the cylindrical valve seat adopts smooth design, which can accelerate the fluid flow until the fluid reaches the downstream of the valve seat, and the chamber suddenly becomes larger. At this time, the pressure drop caused by the center part of the flow channel leads to the rapid expansion of the fluid toward the flow center part. While the energy of the fluid flow also quickly disperses and evaporates, and the fluid enters turbulent condition. The efficient discharge process ensures that the fluid can form steam when supersaturated, while cooling the remaining liquid, which is a typical way to use flash evaporation in liquid flow.
In order to meet the various needs of the device, we can produce valves in the pressure range of ANSI 150 to ANSI 2500. Standard stop valve size is 3/4"(DN20), 1"(DN25), 1.1/2"(DN40), 2"(DN50), 2-1/2"(DN65) and 3"(DN80). The standard form of SNT valve is angular connection, to allow a uniform flow of fluid.The through way type stop valves are also available. According to the control, it can be divided into manual, pneumatic and electric control. For accurate throttling control, based on the flow evaluation in the SNT internal-design structure, the Fluent-Code of a computational Fluid Dynamics is used to simulate and analyze the flow channel and its pressure drop. All SNT internals are usually surface-hardened with high-quality Co-Ni based alloys or surface-treated with Cr-N ceramic coatings to prevent abrasion and corrosion due to high pressure drops and flow rates. Product Description
Rated flow coefficient comparison tableApplication 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 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.
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.
The intermittent drain valve usually adopts the lever type rapid discharge mechanism, which can realize the rapid opening and closing. 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.
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.
Conditions&Solutions
Pressure and Temprature Parameters
Production application
Our Advantages
SNT Ball Valves are meticulously engineered to comply with a multitude of international standards, including ASME B16.34-2009, ASME B16.10-2000, and API 589-2009. This versatile series finds extensive applications across various industries such as petroleum, chemical industry, light industry, pharmaceuticals, paper-making, metallurgy, and power stations.
Their Outstanding Features Include:
Streamlined design for effortless disassembly.
Designed with ease of maintenance in mind, our ball valves feature a non-tight fit design that facilitates quick servicing, minimizing downtime during periodic maintenance.
Cutting-edge sealing technology for maximum security.
The multi-layer sealing of stem and body delivers dual protection through a combination of O-ring and graphite or PTFE, ensuring exceptional sealing performance.
This innovative design meets the rigorous TA-Luft/Shell SPE 77/312 standards.
Extended Service Life for Superior Cost-Efficiency
Our metal seated ball valves undergo advanced processing techniques such as spray welding, spraying, and fusion welding. This guarantees a hardness range of HRC58-73 and a binding force of 80-40MPa, with an impressive on-off cycle lifespan exceeding 100,000 operations and a leakage class of ANSI VI.
Modular Design for Enhanced Convenience
The modular inner sealing design allows for easy interchangeability between soft and metal seats, ensuring flexibility and reliability.
Varied Connection Types for User Convenience
Our valves are available in various connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW, all of which conform to international standards, providing seamless and user-friendly integration.
Extensive Application Experience Guarantees Reliability
SNT Valves have earned a stellar reputation through widespread use in petroleum, chemical industry, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We deliver optimal solutions tailored to specific service conditions, ensuring market-leading reliability.
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.
