Y Type High Pressure Boiler Blow-Down Valves - ANSI150 to ANSI2500

• Customization: Available
• Media: Gas
• Temperature: High Temperature
• Model NO.: SERIES DRAIN VALVE
• Actuator: Manual
• Material: Carbon Steel
• Structure: Through Way Globe Valve
• Sealing Form: Gland Packings Globe Valve
• Stem Thread Position: Outside Screw Stem 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-ANSI2500
• Rated Stroke: 25405060 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: Standard Connection: Sw/Optional Connection: Bw or
• Casting Mode 1: ANSI900 and Below Use Flange Connections
• Casting Mode 2: ANSI1500 and Above Are Butt Welded Connections
• Casting Mode 3: Cap of Angle and Straight Through Body: Bolted
• Transport Package: Wooden
• Trademark: SNT
• Origin: China
• HS Code: 8481804090
• Production Capacity: 500000PCS/Year

Product Description

Standard Mat.Comparison

 

 

^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

About SNT Blow-down Valves

SNT Machinery (Qingdao) Co., Ltd. (commonly known as SNT) stands as a prestigious valve manufacturing enterprise. We focus on the innovative development, meticulous design, and expert production of cutting-edge fluid flow and valve technologies.

SNT Our robust SNT drain valves are ingeniously designed for seamless operation in demanding continuous throttling control scenarios. These include applications such as boiler continuous drainage, high-pressure vessel sampling, high-pressure discharge, and boiler feed pump bypass system releases. Moreover, they are ideal for scenarios involving high-pressure differentials and corrosion-prone heater drain-to-condenser processes. Unlike traditional valves, which can falter under such strenuous conditions due to high flow rates causing severe erosion, our SNT valves boast superior durability and robustness. They triumph in conditions where traditional cutoff drain valves and even venturi valves may fail.

The innovative SNT drain valve redefines conventional internal structure designs. Its sleek flow channel design between the valve core and cylindrical valve seat accelerates fluid flow efficiently. As fluid reaches the downstream valve seat, it enters an expanded chamber where a pressure drop occurs, prompting rapid fluid expansion towards the flow center. This process swiftly dissipates and evaporates fluid energy, inducing a turbulent state. This effective discharge ensures the formation of steam under supersaturation, simultaneously cooling any remaining liquid-a signature method of harnessing flash evaporation within liquid flows.

To accommodate diverse operational requirements, we manufacture valves across the ANSI pressure range 150 to ANSI 2500. Our standard stop valve sizes include 3/4" (DN20), 1" (DN25), 1.1/2" (DN40), 2" (DN50), 2-1/2" (DN65) and 3" (DN80). The SNT valves' standard configuration features an angular connection for optimal fluid flow uniformity. We also offer through-way type stop valves, available in manual, pneumatic, and electric control models to suit precise throttling needs. We leverage our advanced SNT internal-design structure with computational Fluid Dynamics simulations using Fluent-Code for accurate flow and pressure drop analysis. To enhance longevity, all SNT internal components are surface-hardened with premium Co-Ni-based alloys or treated with Cr-N ceramic coatings, ensuring resilience against abrasion and corrosion from high-pressure drops and flow rates.



 

Product Description

SNT - SERIES DRAIN VALVE
3/4"(DN20)~3"(DN80) ANSI Class 150~1500
 

^Applications		^-Steam boiler, evaporator and other boiler water continuous drain control-Flow and pressure regulation and flash application-Steam boiler, evaporator and other boiler water intermittent drain control		^Manual operation control
^Nominal pressure		^ANSI 150, 300, 600, 900, 1500		^Pressure class >=ANSI1500 for RT test
^Nominal diameter	^Forging mode	^3/4 "(DN20), 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
	^Casting mode	^-ANSI 900 and below with flange connections-ANSI1500 and above are butt welded- Cap of Angle body: bolted connection		^Metal self-sealing structure form for option
^Design calculation		^-Angular connection- Under the condition of high pressure difference, two or more Angle valves are used for fluid pressure precise control-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, casting, bar stock- Heat treatment of valve internalsValve core: surface hardening or nit riding treatmentSeat: Nit riding or surfacing with STL alloy		^Other hole types: Conical hole/labyrinth runnerSurface hardening: surfacing STELLITE Gr.6Surface hardening of seat: Other options
^Material		^-Carbon steel- Alloy steel- Stainless steel High quality Alloy steel	^A105N, A182-F22A182-F304(L),A182-F316(L)As required by customer

 

<sup>Notes:
1. S101 hard surface technical description: Enjoys a robust hardness rating of HRC≥55, crafted through a metallurgical combination that ensures exceptional durability and resistance to chipping.
2. S503 hard surface technical description: This layer is crafted to a thickness of 1.5mm and possesses a hardness of HRC≥55, with a binding force of 400MPa, providing superior adhesion that deters detachment.
3. S505 hard surface technical description: With a refined thickness of 0.3mm, it boasts a remarkable hardness of HRC≥65 and a steadfast binding force of ≥250MPa.</sup>



Rated flow coefficient comparison table



Application of Typical Working Conditions
 

^{As depicted in the figure on the left, in accordance with ASME B31.1 Power Boilers and Piping standards, intermittent drain valves are commonly employed in Zone 2 settings and are strategically installed directly in the boiler or along its piping. Additionally, continuous drain valves, traps, safety valves, and other components are used.}

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

The intermittent drain valve is engineered with a lever-type rapid discharge mechanism, facilitating the swift opening and closing of the valve. When the valve is actuated, sediment, debris, and other particulates at the boiler's base are expelled swiftly, within a mere 3 seconds, preventing significant water loss and optimizing resource efficiency by maintaining a nearly linear flow channel.

The emergency stop valve is crucial for effectuating a precise pipeline shut-off, averting unnecessary resource depletion in the event of an intermittent drain valve malfunction.</sup>

Conditions&Solutions

Pressure and Temperature Parameters: Experience unparalleled durability and reliability with SNT Machinery's Y Type High Pressure Boiler Blow-down Valves, built to withstand pressure ratings from ANSI150 to ANSI2500. Engineered to perform seamlessly even under the most demanding temperature conditions, our valves offer exceptional stability and resilience, making them an indispensable component of your high-pressure systems.

SNT Valve Advantages

 

^{1. SNT Machinery (Qingdao) Co., Ltd. is a comprehensive enterprise engaged in design, development, production, sales, and service, seamlessly integrating industry expertise with a trade-oriented approach.}

<sup>2. Experience unparalleled quality, competitive pricing, and exceptional service delivered by our team of skilled professionals offering innovative solutions to every challenge.
3. Manufacture certified for Special Equipment Type Test Certificates, ensuring superior standards.</sup>

^{4. In strict alignment with ISO9001 and API SPECQ standards, we meticulously establish and implement control methods, processes, and equipment, including inspection and testing apparatus. Our commitment ensures the design, manufacturing, inspection, testing, installation, and service processes are impeccably integrated and complete within the entire system.}

<sup>5. Our exemplary research and development team boasts nearly 100 patented innovations, continually advancing our product offerings.
6. SNT specializes in providing comprehensive solutions for Control valves and associated actuators, serving industries such as Petroleum, Chemical, Power, Storage Tank, Air Separation, Coal Chemical, and Liquefied Natural Gas with precision and expertise.</sup>

 

Production application

 

 

Company Profile