Angle Type Boiler Blow-Down Valve - High Pressure & Temperature DN20 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: HRC ≥ 55, metallurgically bonded for superior durability and resistance to detachment.
2. S503 Hard Surface Technical Description: Impressive 1.5mm thickness, hardness HRC ≥ 55, with a robust binding force of 400MPa, ensuring resilience and longevity.
3. S505 Hard Surface Technical Description: Compact 0.3mm thickness, exceptional hardness HRC ≥ 65, and binding force ≥ 250MPa, designed for high-performance applications.</sup>

About SNT Blow-down Valves

SNT Machinery (Qingdao) Co., Ltd. (fondly known as SNT) stands at the forefront of the valve manufacturing industry. We specialize in pioneering the art and science of fluid flow and valve technology development, design, and production.

SNT The SNT drain valve is a versatile powerhouse, making significant strides in continuous throttling control applications. It shines in scenarios such as boiler continuous drain, high-pressure vessel and reactor sampling, and high-pressure discharge. Perfectly suited for boiler feed pump bypass system release devices and handling high-pressure differences (pressure release) conditions, it also excels in heater drainage to condenser processes, especially under corrosive and high flow rate conditions. Unlike traditional valves, the SNT valve is engineered for resilience and durability, enduring continuous drain conditions that typically wreak havoc on inferior valves. In high flow rate environments where erosion poses a serious threat, the SNT valve stands unwavering, surpassing the fragile limitations of both conventional cutoff and venturi valves.

The SNT drain valve revolutionizes the internal structure design paradigm by adopting a streamlined flow channel between the valve core and the cylindrical valve seat. This innovative design accelerates fluid flow until it reaches the expanded downstream section, where the pressure drop initiates a rapid fluid expansion towards the flow center. This dynamic process efficiently disperses energy, leading the fluid into a turbulent state. The discharge process is so efficient that it enables the formation of steam when the fluid is supersaturated, simultaneously cooling the remaining liquid-a quintessential demonstration of flash evaporation in liquid flow.

To cater to diverse device requirements, we offer valves with an expansive pressure range from ANSI 150 to ANSI 2500. Our standard stop valve sizes begin at 3/4" (DN20), extending to 1" (DN25), 1.1/2" (DN40), 2" (DN50), 2-1/2" (DN65), and reaching 3" (DN80). The SNT valve is designed in a standard angular connection form, ensuring a smooth and consistent fluid flow. Additionally, the through-way type stop valves are available for varying needs. Our valves can be controlled manually, pneumatically, or electrically, offering precision in throttling control. Based on thorough flow analysis within the unique SNT internal design structure, we utilize Computational Fluid Dynamics (CFD) Fluent-Code to simulate and scrutinize flow channels and pressure drops. To combat abrasion and corrosion from high pressures and flow rates, all SNT internals undergo surface-hardening with premium Co-Ni based alloys or Cr-N ceramic coatings.


 

 

Product Description

Rated Flow Coefficient Comparison Table



Application of Typical Working Conditions
 

^{As depicted in the figure on the left, and adhering to ASME B31.1 Power Boilers and Piping standards, it is observed that intermittent drain valves are predominantly utilized in Zone 2, being installed directly within the boiler or its associated boiler piping. Additionally, there are continuous drain valves, along with traps and safety valves, amongst others.}

<sup>In alignment with §122.1.4 of ASME B31.1 Power Boilers and Piping standards, the piping is conventionally equipped with two valves in sequence: a Y-type intermittent drain valve, followed by an emergency stop valve.

The intermittent drain valve typically employs a lever-type rapid discharge mechanism, enabling swift opening and closing. When activated, the valve proficiently expels sediment, dirt, and other particulates from the boiler's base in under 3 seconds. If extended, excessive boiler water discharge may occur, leading to significant resource wastage. The flow channel remains nearly linear, akin to a straight pipeline.

The emergency stop valve serves to strictly sever the pipeline, preventing resource wastage should the preceding intermittent drain valve encounter failure.</sup>

Conditions&Solutions

Pressure and Temperature Parameters: Experience unparalleled performance with our Angle Type Boiler Blow-down Valve, expertly designed to withstand high pressure and temperature conditions. Engineered for excellence, this robust valve guarantees reliability and longevity in even the most demanding environments, making it an indispensable asset for your industrial needs.

 

Production application

 

 

Our Advantages

^{SNT Ball Valves are the epitome of precision engineering, crafted to meet and exceed a vast array of international standards. These include the rigorous ASME B16.34-2009, ASME B16.10-2000, and API 589-2009. This adaptable series caters to an extensive range of industries, including petroleum, chemical manufacturing, light industries, pharmaceuticals, paper production, metallurgy, and power generation facilities.}

<sup>Their Remarkable Features Include:
Sleek and streamlined design ensuring effortless disassembly and reassembly.
With maintenance simplicity at the forefront, our ball valves are engineered with a non-tight fit design. This innovation allows for swift servicing, thus minimizing downtime during scheduled maintenance and boosting operational efficiency.

State-of-the-art sealing innovations for unparalleled security.
The sophisticated multi-layer sealing of both stem and body provides dual protection. This is achieved through an intricate blend of O-ring and either graphite or PTFE, guaranteeing exceptional sealing performance.
This pioneering design complies with the stringent TA-Luft/Shell SPE 77/312 standards.

Prolonged Service Life for Unmatched Cost-Efficiency
Our metal seated ball valves benefit from cutting-edge processing techniques such as spray welding, spraying, and fusion welding. This results in a formidable hardness range of HRC58-73 and a binding force of 80-40MPa. With an impressive lifespan of over 100,000 on-off cycles and a leakage class of ANSI VI, these valves are designed for durability and efficiency.

Modular Design for Superior Convenience
The modular inner sealing design offers unmatched convenience, allowing for seamless interchangeability between soft and metal seats. This ensures both flexibility and reliability tailored to diverse operational requirements.

Diverse Connection Options for User Ease
Our valves are available in a plethora of connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW. Each connection type adheres to international standards, providing effortless and user-friendly integration.

Rich Application Experience Ensures Trustworthy Reliability
SNT Valves have garnered an esteemed reputation through extensive application in industries such as petroleum, chemical manufacturing, light industries, pharmaceuticals, paper production, metallurgy, and power generation. We offer optimized solutions tailored to specific service conditions, ensuring market-leading reliability and performance.</sup>