TF5321 threaded bronze check valve
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  • TF5321 threaded bronze check valve

I. Structural Features and Applications

Structural Features

  • Corrosion-Resistant Copper Body The valve body is made of brass H62 (in accordance with GB/T 5231-2012), with a copper content ≥60%, tensile strength ≥300MPa, resistant to tap water and hot and cold water corrosion, free of iron rust pollution, suitable for drinking water systems, and has a service life more than 3 times longer than cast iron valves.
  • Integrated Check Valve Function Built-in spring-type check valve core (made of 2Cr13 stainless steel), forward opening pressure ≤0.02MPa (2kPa), automatic reverse sealing to prevent backflow, reverse leakage rate ≤0.01% (tested according to GB/T 8464-2023), realizing the "gate valve shut-off + check valve backflow prevention" two-in-one function, reducing the number of pipes and valves.
  • Convenient Threaded Connection Uses G/NPT standard threads (in accordance with GB/T 7306.1-2000), suitable for small-diameter pipes DN15~DN50, thread accuracy 7H/6g, can be quickly installed with pipe pliers, no flange required, suitable for small spaces such as kitchens and bathrooms.
  • Elastic Seat Seal The gate valve is covered with EPDM rubber (in accordance with GB/T 21873-2008), which elastically fits the sealing surface of the valve body, and the bidirectional sealing leakage rate is ≤0.01% (tested according to GB/T 13927-2008), suitable for clean media such as clear water, drinking water, and hot and cold water.

Applications

Suitable for small-diameter copper pipe systems that require simultaneous control of on/off and backflow prevention, suitable for media such as drinking water, tap water, and hot and cold water, widely used in residential water supply and drainage branch pipes (to prevent backflow pollution), commercial kitchen hot and cold water pipes, pure water equipment pipelines, small heating and ventilation systems, etc., especially suitable for occasions with requirements for material hygiene and backflow prevention.

 

II. Main Technical Parameters (According to National Standard Conventional Values)

Item Parameter Range
Nominal Pressure (PN) PN16 (1.6MPa)
Shell Test Pressure 2.4MPa (1.5 times the nominal pressure)
Sealing Test Pressure 1.76MPa (1.1 times the nominal pressure)
Applicable Medium Drinking water, tap water, hot and cold water (≤80℃)
Applicable Temperature (℃) -10~80 (EPDM rubber adaptable)
Nominal Diameter (DN) DN15~DN50
Check Valve Opening Pressure ≤0.02MPa (2kPa)
Connection Method Threaded (G/NPT, in accordance with GB/T 7306.1-2000)
Implementation Standard GB/T 12232-2005, GB/T 8464-2023

 

III. Main Component Materials (Conventional Configuration)

Product Part Material (National Standard Conventional Material)
Valve Body / Valve Cover Brass H62 (in accordance with GB/T 5231-2012, copper content ≥60%)
Gate Valve Brass substrate + EPDM rubber (overall coating, rubber hardness 70±5 Shore A)
Check Valve Core 2Cr13 stainless steel (with 304 stainless steel spring, service life ≥5000 cycles)
Valve Stem Brass H62 (polished surface for corrosion protection)
Valve Stem Nut Tin bronze ZCuSn10Pb1 (wear-resistant, reduces opening and closing torque)
Sealing Element EPDM rubber (food grade, in accordance with GB 4806.11-2022)
Handwheel Cast iron (powder coated surface, with "open/close" markings)

 

IV. Main External Dimensions and Connections (Unit: mm, according to national standard conventional values)

Nominal Diameter DN Thread Specification (G) Structural Length L Total Height H Handwheel Diameter D0 Operating Torque (N·m)
15 G1/2" 108 190 100 ≤30
20 G3/4" 117 210 120 ≤40
25 G1" 127 230 140 ≤50
32 G11/4" 140 250 160 ≤60
40 G11/2" 165 265 160 ≤70
50 G2" 180 280 180 ≤80

 

V. Application Scenarios

  • Residential Drinking Water System Kitchen and bathroom branch pipes. The copper material meets hygiene requirements, and the check valve function prevents backflow of stagnant water pollution (in accordance with GB 50015-2019 "Building Water Supply and Drainage Design Standard").
  • Commercial Kitchen Hot and cold water supply pipes, temperature and humidity resistant, with a check valve function to prevent the mixing of hot and cold water affecting the water temperature (adaptable to CJ/T 188-2018 "Kitchen equipment fire extinguishing device" supporting pipeline).
  • Pure water equipment Pre-treatment pipeline, copper material with no leaching, ensuring that the water quality meets the standard, and a check valve function to protect the equipment from backwater impact.
  • Small HVAC system Wall-hung boiler inlet and outlet pipes, backflow protection device, threaded connection suitable for the small installation space of wall-hung boilers.

 

Keyword

TF5321 threaded bronze check valve
+
  • TF5321 threaded bronze check valve

TF5321 threaded bronze check valve

TF5321 threaded brass check valve core advantages: brass material is sanitary and corrosion-resistant, integrated check function (two-in-one valve), threaded installation is convenient, and the elastic seat seal is leak-proof. Produced according to national standards, adaptable to PN16, DN15~DN50, suitable for drinking water, cold and hot water, and other small-diameter systems with requirements for material and backflow prevention. It is an ideal choice that combines hygiene and functionality.

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