Manual/Pneumatic/Eletric/Series Type High Pressure & Temperature Boiler Blow-Down Valve DN20-DN80 with Carbon Steel Materials

• 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 - Y-TYPE THROUGH DRAIN VALVE
1"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 Sheet

^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>Notes:
1. S101 Hard Surface Technical Description: With an impressive hardness of HRC≥55, the S101 provides a robust metallurgical combination that ensures exceptional durability and resistance to detachment, making it less likely to fall out.
2. S503 Hard Surface Technical Description: Featuring a thickness of 1.5mm and a hardness of HRC≥55, the S503 is engineered with a binding force of 400MPa, ensuring it remains steadfast and resistant to detachment.
3. S505 Hard Surface Technical Description: This premium surface boasts a thickness of 0.3mm, an impressive hardness of HRC≥65, and an exceptional binding force of ≥250MPa, delivering superior durability and resilience.</sup>

About SNT Blow-down Valves

SNT Machinery (Qingdao) Co., Ltd., affectionately known as SNT, stands as a beacon in the valve manufacturing industry, specializing in the cutting-edge development, innovative design, and precision production of fluid flow and valve technology. Our company is synonymous with quality and expertise.

SNT The robust SNT drain valve is engineered for excellence in continuous throttling control across a range of demanding applications. Its prowess shines in scenarios like boiler continuous drain, sampling from high-pressure vessels and reactors, high-pressure discharge management, boiler feed pump bypass release, and handling high-pressure differences. Moreover, it excels in heater drain processes leading to condensers, especially under conditions of corrosion and high flow rate flash. Unlike traditional valves, the SNT valve boasts unparalleled durability, making it the go-to solution for continuous drain environments that traditionally wreak havoc on other valve types. In such scenarios, where high flow rates and severe erosion are prevalent, conventional cutoff and venturi valves pale in comparison.

The SNT drain valve pioneers a groundbreaking internal structure design. Its flow channel, expertly crafted between the valve core and cylindrical seat, is sleek and streamlined, optimizing fluid acceleration. As the fluid advances downstream beyond the valve seat, the chamber expands dramatically, promoting a significant pressure drop at the center of the flow channel. This ingenious design facilitates rapid fluid expansion towards the channel's core, dissipating energy swiftly and transitioning the fluid into a dynamic turbulent state. This process not only ensures the fluid forms steam when supersaturated but also cools the residual liquid through flash evaporation-a hallmark of efficient liquid flow management.

In our commitment to satisfying diverse operational requirements, SNT offers an extensive range of valves manufactured to ANSI pressure standards. 150 to ANSI 2500. Our standard stop valves boast an array of sizes, starting from 3/4" (DN20), 1" (DN25), 1.1/2" (DN40), 2" (DN50), to 2-1/2" (DN65) and 3" (DN80). The SNT valve's standard form is engineered with an angular connection, ensuring a harmonious and uniform fluid flow. Additionally, through way type stop valves are readily available. Depending on control needs, SNT valves are classified into manual, pneumatic, and electric control variations. For precision throttling, our valves are developed using a Fluent-Code computational Fluid Dynamics simulation to meticulously analyze flow channels and pressure drops. To combat abrasion and corrosion due to high pressure drops and flow velocities, all SNT internals are fortified with surface treatments of high-quality Co-Ni based alloys or Cr-N ceramic coatings, ensuring longevity and superior performance.


 

 

Product Description

Comprehensive Rated Flow Coefficient Comparison Table



Application in Real-world Working Conditions
 

^{As beautifully illustrated in the remarkable figure on the left, and adhering to the esteemed ASME B31.1 Power Boilers and Piping standards, intermittent drain valves are typically utilized in Zone 2, installed seamlessly in boiler systems or their associated piping. Additionally, there exist continuous drain valves, alongside traps, safety valves, and more, ensuring comprehensive system protection.}

<sup>Per the detailed specifications of §122.1.4 of ASME B31.1 Power Boilers and Piping, the piping is strategically equipped with dual valves in series: a Y-type intermittent drain valve coupled with an essential emergency stop valve for optimal safety.

The intermittent drain valve boasts a lever-type rapid discharge mechanism, facilitating swift opening and closure with utmost efficiency. Upon activation, the valve adeptly expels sediment, dirt, and particulates from the boiler's base with lightning speed-under 3 seconds. Extended discharge could inadvertently deplete substantial boiler water, leading to resource wastage. The flow channel is ingeniously designed akin to a direct pipeline.

The pivotal emergency stop valve is engineered to ensure a precise cut-off of the pipeline, safeguarding against resource depletion in the event that the preceding intermittent drain valve encounters a malfunction.</sup>

Conditions&Solutions

Pressure and Temperature Parameters: Discover the advanced engineering behind our Series Type High Pressure & Temperature Boiler Blow-down Valve DN40. Our product is meticulously designed to withstand extreme pressure and temperature conditions, ensuring unwavering performance and safety. Trust in our cutting-edge technology for uncompromised operational excellence.

 

Production application

 

 

Our Advantages

^{SNT Ball Valves are crafted with precision, adhering to an extensive array of global standards, including ASME B16.34-2009, ASME B16.10-2000, and API 589-2009. This dynamic series serves a broad spectrum of industries such as petroleum, chemical industry, light industry, pharmaceuticals, paper-making, metallurgy, and power stations, demonstrating exceptional versatility.}

<sup>Their Remarkable Features Include:
A streamlined design that ensures effortless disassembly and reassembly.
Engineered with intuitive maintenance in mind, our ball valves boast a non-tight fit design for expedited servicing, significantly reducing downtime during routine maintenance.

State-of-the-art sealing technology for unparalleled security.
The multi-layer sealing of stem and body provides dual-layer protection using a combination of O-ring and graphite or PTFE, delivering superior sealing capabilities.
This pioneering design complies with the stringent TA-Luft/Shell SPE 77/312 standards.

Prolonged Service Life for Exceptional Cost-Effectiveness
Our metal seated ball valves undergo sophisticated processing techniques including spray welding, spraying, and fusion welding. This ensures a hardness range of HRC58-73 coupled with a binding force of 80-40MPa, boasting a remarkable on-off cycle lifespan exceeding 100,000 operations, along with a leakage class of ANSI VI.

Modular Design for Superior Convenience
The modular inner sealing design provides effortless interchangeability between soft and metal seats, allowing for unmatched flexibility and dependability.

Diverse Connection Types for Maximum User Convenience
Our valves are available in a wide range of connection types, such as flanged (RF, FF, FM, G, RJ), screw-thread, and BW, all aligned with international standards, ensuring seamless integration and ease of use.

Rich Application Experience Assures Unmatched Reliability
SNT Valves have established an exemplary reputation through widespread application in industries such as petroleum, chemical, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We provide optimal solutions tailored to specific service conditions, ensuring market-leading reliability and performance.</sup>