Sw/Bw/Flanged Series Type High Pressure & Temperature Boiler Blow-Down Valve DN50 with Stainless 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 Machinery - 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: Featuring a robust HRC≥55 hardness, our S101 offers a metallurgical bond that ensures durability and resistance to detachment;
2. S503 Hard Surface Technical Description: With a 1.5mm thickness and an impressive HRC≥55 hardness, the S503 is fortified by a binding force of 400MPa, making it resistant to wear and detachment;
3. S505 Hard Surface Technical Description: At just 0.3mm thick, the S505 boasts an exceptional hardness of HRC≥65 and a superior binding force of ≥250MPa, ensuring long-lasting performance.</sup>

About SNT Blow-down Valves

SNT Machinery (Qingdao) Co., Ltd. (commonly known as SNT) is a distinguished leader in the valve manufacturing landscape, excelling in the art of developing, designing, and producing cutting-edge fluid flow and valve technologies. Our expertise ensures superior performance and reliability across a multitude of applications.

SNT Our state-of-the-art SNT drain valves offer versatile solutions for precision throttling control in demanding environments. Perfect for applications such as boiler continuous drainage, high-pressure vessel and reactor sampling, high-pressure discharges, boiler feed pump bypass release, and conditions with high-pressure differentials. The SNT valve excels in harsh environments where traditional valves fail, thanks to its durability and robustness. It thrives under continuous drain conditions with high flow rates, preventing damage that typically plagues conventional valves, including the fragile venturi designs.

The SNT drain valve revolutionizes traditional valve architecture. Featuring a streamlined flow channel between the valve core and cylindrical seat, it enhances fluid acceleration to reach optimal velocities as it exits the valve seat. The sudden expansion in the chamber facilitates rapid pressure drops, encouraging fluid expansion towards the flow center. This induces energy dispersion, leading to fluid turbulence and effective flash evaporation. This advanced process ensures steam formation from supersaturation, cooling any residual liquid, epitomizing the intelligent application of flash evaporation in liquid flow systems.

To cater to diverse operational requirements, our valves are crafted within the pressure thresholds from ANSI 150 to ANSI 2500. Our standard stop valve dimensions include 3/4" (DN20), 1" (DN25), 1.1/2" (DN40), 2" (DN50), 2-1/2" (DN65), and 3" (DN80). The quintessential SNT valve comes in an angular connection form, ensuring a seamless fluid flow. The availability of through-way type stop valves adds to the versatility. Whether manual, pneumatic, or electric, our controls allow for precise throttling. Thanks to our in-depth flow evaluations and advanced Fluent-Code simulations within the SNT internal-design structure, we ensure optimal performance. Our valve internals are fortified with premium Co-Ni based alloys or Cr-N ceramic coatings, providing exceptional resistance against abrasion and corrosion even under severe pressure drops and elevated flow rates.


 

 

Product Description

Rated flow coefficient comparison table



Application of Typical Working Conditions
 

^{As shown in the figure on the left, in accordance with ASME B31.1 Power Boilers and Piping guidelines, the intermittent drain valves are typically employed in Zone 2 and are strategically installed directly within the boiler or its associated piping. Additionally, there are continuous drain valves, alongside traps and safety valves, etc., as part of the system.}

<sup>According to §122.1.4 of ASME B31.1 Power Boilers and Piping, the piping is commonly equipped with two valves in series, comprising a Y-type intermittent drain valve along with an emergency stop valve for enhanced safety.

The intermittent drain valve is designed with a lever type rapid discharge mechanism, which facilitates swift opening and closing functionality. Upon activation, the valve ensures quick expulsion of sediment, debris, and other particulates from the boiler's base, typically within 3 seconds. Excessive discharge duration can lead to substantial water loss, resulting in resource wastage. The flow path closely resembles a straight pipeline configuration.

The emergency stop valve is crucial for achieving an airtight closure of the pipeline, effectively preventing resource wastage in the event of intermittent drain valve malfunction.</sup>

Conditions&Solutions

Pressure and Temperature Parameters: Our Series Type High Pressure & Temperature Boiler Blow-down Valve DN50 is meticulously crafted to operate flawlessly under extreme conditions. It is engineered to withstand high pressures and temperatures, ensuring robust performance and durability in all environments.

 

Production application

 

 

Our Advantages

^{SNT Ball Valves exemplify precision engineering, crafted to adhere to a wide array of esteemed international standards such as ASME B16.34-2009, ASME B16.10-2000, and API 589-2009. This adaptable series serves as a cornerstone across diverse industries including petroleum, chemical, light manufacturing, pharmaceuticals, paper production, metallurgy, and power generation.}

<sup>Their Outstanding Features Include:
Streamlined design ensuring effortless disassembly, providing unparalleled convenience.
Our ball valves are intentionally crafted with maintenance simplicity at their core. Equipped with a non-tight fit design, they allow swift servicing, effectively reducing downtime during routine maintenance cycles.

Cutting-edge sealing technology crafted for ultimate security and peace of mind.
The valve's multi-layer sealing system between stem and body provides dual-layered protection utilizing a combination of advanced O-ring and graphite or PTFE materials, guaranteeing stellar sealing performance.
Ingeniously designed to meet the stringent requirements of standards like TA-Luft/Shell SPE 77/312, ensuring top-notch performance.

Extended Service Life for Superior Cost-Efficiency
Our metal seated ball valves undergo state-of-the-art processing techniques, including spray welding, spraying, and fusion welding, achieving a hardness range of HRC58-73 and a binding force of 80-40MPa. With an impressive operational lifespan exceeding 100,000 on-off cycles and a leakage class of ANSI VI, they promise unmatched durability and cost-effectiveness.

Modular Design for Enhanced Convenience
The modular inner sealing configuration enables effortless interchangeability between soft and metal seats, providing unmatched flexibility and reliability tailored to your specific needs.

Varied Connection Types for User Convenience
Our valves offer a plethora of connection types including flanged (RF, FF, FM, G, RJ), screw-thread, and BW. All types rigorously adhere to international standards, ensuring seamless and user-friendly integration into your systems.

Extensive Application Experience Guarantees Reliability
SNT Valves have garnered a stellar reputation owing to their expansive use across sectors like petroleum, chemical, light industry, pharmaceuticals, paper production, metallurgy, and energy stations. We provide optimal solutions finely tuned to specific service conditions, ensuring you receive reliability that leads the market.</sup>