Premium DN65 High Pressure Boiler Blow-Down Valve Solutions with Carbon Steel Materials

• 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., affectionately known as SNT, stands at the forefront of innovation as a valve manufacturing powerhouse. Mastering the art of fluid dynamics, SNT specializes in the meticulous development, avant-garde design, and precision production of cutting-edge fluid flow and valve technology.

SNT The SNT drain valve is expertly engineered to thrive in diverse high-demand scenarios such as continuous throttling control. It excels in applications like boiler continuous drain, high-pressure vessel sampling, reactor sampling, high-pressure discharge, boiler feed pump bypass system release, and more. When faced with high-pressure differentials or corrosive conditions like heater drains to condensers at high flow rates, SNT's design outshines traditional valves in durability and reliability. Unlike fragile traditional cutoff and even venturi valves, the SNT valve endures the challenges of high flow rates and erosion. Its robust construction is perfectly suited for continuous drain environments, preventing damage and ensuring longevity.

The SNT The SNT drain valve redefines conventional internal design concepts with its innovative approach. It features a streamlined flow channel between the valve core and cylindrical valve seat, accelerating fluid flow effortlessly. As fluid reaches the downstream valve seat, the chamber dramatically enlarges, causing a pressure drop that propels rapid fluid expansion towards the flow center. This leads to swift energy dissipation and evaporation, inducing a turbulent condition. This process guarantees efficient discharge, allowing fluid to vaporize when supersaturated and simultaneously cool any remaining liquid, exemplifying the sophisticated use of flash evaporation in liquid flow.

To cater to diverse device requirements, we offer valves across a pressure spectrum from ANSI 150 to ANSI 2500. The standard stop valve sizes range from 3/4"(DN20), 1"(DN25), 1-1/2"(DN40), 2"(DN50), 2-1/2"(DN65), to 3"(DN80). SNT valves are generally crafted with an angular connection to ensure a seamless fluid flow. Our through way type stop valves are also at your disposal. Depending on the desired control, options span manual, pneumatic, and electric configurations. For precise throttling control, SNT employs computational Fluid Dynamics using the Fluent-Code to meticulously simulate and analyze flow channels and pressure drops within its unique internal design. Every internal component of SNT valves is typically fortified with high-grade Co-Ni based alloys or treated with Cr-N ceramic coatings, safeguarding against abrasion and corrosion from high-pressure scenarios and rapid 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: With a robust hardness of HRC≥55, this metallurgical combination is designed to be resilient, ensuring it remains intact and reliable.
2. S503 Hard Surface Technical Description: Featuring a substantial thickness of 1.5mm, this surface boasts a hardness of HRC≥55 and a binding force of 400MPa, engineered to maintain durability.
3. S505 Hard Surface Technical Description: This refined surface offers a slim thickness of 0.3mm and an impressive hardness of HRC≥65, with a binding force of ≥250MPa for superior performance.</sup>



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, these intermittent drain valves are predominantly employed in Zone 2, where they are seamlessly integrated directly into the boiler or pipingsystems. Additionally, there are continuous drain valves, traps, safety valves, and more, enhancing the system's functionality.}

<sup>In line with §122.1.4 of ASME B31.1 Power Boilers and Piping, the piping architecture typically incorporates two valves in series: a Y-type intermittent drain valve coupled with an emergency stop valve, ensuring optimal control.

The intermittent drain valve is adeptly designed with a lever-type rapid discharge mechanism, facilitating swift opening and closure. When activated, the valve expedites the expulsion of sediment, dirt, and other particles from the boiler's base efficiently-completed within 3 seconds. Prolonged discharge could lead to excessive boiler water loss, causing resource wastage. The flow path resembles a straight pipeline.

The emergency stop valve ensures a stringent pipeline cut-off, preventing resource wastage in the event of an intermittent drain valve malfunction.</sup>

Conditions&Solutions

Pressure and Temperature Parameters: The Through Way Type High Pressure Boiler Blow-down Valves - DN65 Specs are crafted to withstand rigorous pressure and temperature demands. Our product excels under high-stress environments, maintaining peak performance, and offering unparalleled reliability and safety in challenging scenarios.

SNT Valve Advantages

 

^{1. SNT Machinery (Qingdao) Co., Ltd. stands as a premier entity that seamlessly integrates design, development, production, sales, and service in industry and trade, marking its place as a business powerhouse with a comprehensive approach.}

<sup>2. Experience unparalleled quality, competitive pricing, and exceptional service delivered by our professional team, equipped with innovative solutions to tackle any challenge with creativity and precision.
3. We are accredited with Manufacture for Special Equipment Type Test Certificates, ensuring compliance and excellence in all our products.</sup>

^{4. Adhering to the stringent standards of ISO9001 and API SPECQ, our company meticulously prepares and implements essential control methods, processes, and equipment (including inspection and testing apparatus). This ensures that our design, manufacturing, inspection, testing, installation, and service processes are not only compatible but also comprehensive and seamless within the entire system.}

<sup>5. Our stellar research and development team is a beacon of innovation, boasting nearly 100 patents that elevate our product offerings to new heights.
6. SNT Machinery excels as an enterprise dedicated to providing integrated solutions for control valves and associated actuators, serving a diverse range of industries including Petroleum, Chemical, Power, Storage Tank, Air Separation, Coal Chemical, and Liquefied Natural Gas, ensuring exceptional performance and reliability across all sectors.</sup>

 

Production application

 

 

Company Profile