Angle Type High Pressure & Temperature Boiler Blow-Down Valve DN25

• Customization: Available
• Media: Gas
• Temperature: High Temperature
• Model NO.: Y-Type Through Way Drain Valve
• Actuator: Pneumatic
• Material: Carbon Steel
• 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)
• Transport Package: Wooden
• Trademark: SNT
• Origin: China
• HS Code: 8481804090
• Production Capacity: 500000PCS/Year

Product Description

Standard Mat.Comparison

 

SNT - Leading Innovations in Machinery - Y-TYPE THROUGH DRAIN VALVE: Masterful Engineering for Optimal Fluid Management
1"3/4 (DN20) ~ 3" (DN80) | ANSI Class 150 ~ 1500: Precision and Versatility in Every Valve

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: Your Definitive Guide to Quality and 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

<sup>Important Notes on Superior Quality:
1. S101 Hard Surface Technical Description: Boasting an HRC≥55, featuring a metallurgical combination that ensures the surface is robust and remarkably resistant to detachment.
2. S503 Hard Surface Technical Description: With a formidable thickness of 1.5mm and hardness of HRC≥55, this surface features a binding force of 400MPa, providing exceptional durability and stability.
3. S505 Hard Surface Technical Description: An ultra-thin layer with a thickness of 0.3mm and an impressive hardness of HRC≥65, coupled with a binding force ≥250MPa, ensuring top-tier resilience and reliability.</sup>

About SNT Blow-down Valves

SNT Machinery (Qingdao) Co., Ltd., fondly known as SNT, stands as a beacon of innovation in the valve manufacturing industry. Specializing in the sophisticated realms of fluid flow and valve technology, our company excels in the development, design, and production of top-tier solutions.

SNT Our advanced drain valve showcases versatility and exceptional performance in continuous throttling control scenarios. It is expertly crafted for applications such as seamless boiler drain operations, high-pressure vessel and reactor sampling, efficient high-pressure discharge, and reliable release in boiler feed pump bypass systems. Ideal for high-pressure differential conditions and heater draining to condenser processes, especially where corrosion and high flow rate flash conditions prevail. Unlike traditional valves, the SNT valve boasts unparalleled robustness and durability. It thrives in rigorous continuous drain conditions, overcoming issues like high flow rates and severe erosion that often render conventional cutoff and venturi valves fragile.

The pioneering design of the SNT drain valve redefines traditional internal structure concepts. It features a meticulously smooth flow channel between the valve core and its cylindrical seat. This design innovation enhances fluid acceleration until it reaches the valve seat's downstream, where the chamber dramatically enlarges. This transformation induces a pressure drop at the center of the flow channel, causing fluid to swiftly expand toward the flow center. Concurrently, the energy within the fluid flow disperses and evaporates, transitioning into a turbulent state. This efficient discharge ensures that the fluid can transition into steam upon supersaturation, simultaneously cooling the remaining liquid-a masterful application of flash evaporation principles in liquid flow.

To comprehensively cater to diverse device requirements, we offer valves spanning a pressure range from ANSI 150 to ANSI 2500. The standard sizes for our stop valves include 3/4" (DN20), 1" (DN25), 1.1/2" (DN40), 2" (DN50), 2-1/2" (DN65), and 3" (DN80). The quintessential SNT valve boasts an angular connection, ensuring uniform fluid flow. Additionally, through-way type stop valves are available to suit diverse operational needs. Depending on the control mechanism, options range from manual to pneumatic and electric control systems. For precision throttling, our advanced SNT internal-design structure undergoes rigorous simulation and analysis via the Fluent-Code of Computational Fluid Dynamics. This ensures meticulous flow channel evaluation and pressure drop assessment. All SNT internals are fortified with surface-hardening, utilizing premium Co-Ni based alloys, or are treated with Cr-N ceramic coatings to withstand abrasion and corrosion under high-pressure drops and intense flow conditions.


 

 

Product Description

Rated Flow Coefficient Comparison Table



Application of Typical Working Conditions
 

^{As depicted in the illustration on the left, in adherence to ASME B31.1 Power Boilers and Piping standards, intermittent drain valves are predominantly utilized in Zone 2, being strategically installed directly within the boiler or the associated boiler piping. In addition to these, there exist continuous drain valves, traps, and safety valves, among other critical components.}

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

The intermittent drain valve typically features a lever-type rapid discharge mechanism, enabling swift opening and closing operations. Upon activation, the valve efficiently expels sediment, dirt, and other particulates from the boiler's base within 3 seconds, ensuring minimal loss of boiler water and thereby conserving resources. The flow passage closely mimics a straight pipeline.

The emergency stop valve is engineered to provide an impeccable cut-off of the pipeline, effectively conserving resources in the event of a failure of the preceding intermittent drain valve.</sup>

Conditions&Solutions

Pressure and Temperature Parameters: Discover the precise pressure and temperature parameters that define the robust capabilities of our Angle Type High Pressure & Temperature Boiler Blow-down Valve DN25. These parameters are meticulously established to ensure seamless operation under the most demanding conditions, guaranteeing efficiency and safety in every application.

 

Production application

 

 

Our Advantages

^{SNT Ball Valves are meticulously engineered, adhering to a broad spectrum of esteemed international standards, including ASME B16.34-2009, ASME B16.10-2000, and API 589-2009. This versatile series is trusted for its extensive applications across a multitude of industries, such as the dynamic realms of petroleum, chemical industry, light industry, pharmaceuticals, paper-making, metallurgy, and power stations.}

<sup>Their Outstanding Features Include:
Streamlined design that ensures effortless disassembly, making maintenance a breeze.
Crafted with a user-centric approach, our ball valves feature a non-tight fit design, facilitating swift servicing and sharply minimizing downtime during routine maintenance.

Features cutting-edge sealing technology that promises maximum security and reliability.
The multi-layer sealing of stem and body provides dual protection, using an intelligent combination of O-ring and graphite or PTFE, ensuring unparalleled sealing performance.
This forward-thinking design meets the strict demands of TA-Luft/Shell SPE 77/312 standards, showcasing our commitment to excellence.

Extended Service Life for Superior Cost-Efficiency
Our metal-seated ball valves undergo advanced processing techniques, including spray welding, spraying, and fusion welding. This ensures an exceptional hardness range of HRC58-73 and a robust 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 seamless interchangeability between soft and metal seats, ensuring flexibility, adaptability, and reliability for all applications.

Varied Connection Types for User Convenience
Our valves are offered in a wide variety of connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW. All options conform to international standards, ensuring seamless and user-friendly integration across diverse systems.

Extensive Application Experience Guarantees Reliability
SNT Valves have cultivated a stellar reputation through extensive use in diverse industries such as petroleum, chemical industry, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We provide optimal solutions finely tailored to specific service conditions, ensuring market-leading reliability and trust.</sup>