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LONGDA BRASS VALVE
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Lead-Free Brass Spring Inline Check Valve NPT 1/2-2 Inch

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SKU: 3817800959
Model: LD 30303

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Product Details

Lead-Free Brass Spring Inline Check Valve NPT 1/2-2 Inch

This lead-free brass spring inline check valve model LD 30303 is designed for vertical or horizontal installation in water supply and heating systems. Available in 1/2" to 2" NPT connections, it features a hot-forged brass body with PTFE sealing disc and SS304 spring, ensuring reliable backflow prevention.

Key Selling Points

  • Certified Lead-Free: NSF61 & NSF372 certified, meeting US and Canada drinking water standards.
  • Versatile Installation: Suitable for horizontal or vertical piping with spring-loaded inline design.
  • Durable Materials: Hot-forged brass body, PTFE sealing face, SS304 spring.
  • Wide Size Range: Available from 1/2" to 2" (DN15-DN50).
  • OEM Service: Custom OEM/ODM solutions available.

Technical Specifications

ModelLD 30303
TypeSpring Inline Check Valve
Size Range1/2"–2" (DN15–DN50)
Pressure Rating200 WOG (1.4 MPa)
Working Temperature-20°C to 150°C
ConnectionFemale NPT
Body MaterialHot-forged brass (lead-free optional)
Disc MaterialBrass with PTFE sealing face
Spring MaterialSS304 stainless steel
O-ring / GasketNBR / EPDM

Models and Options

Available in sizes 1/2", 3/4", 1", 1-1/4", 1-1/2", 2" with NPT threads. Lead-free brass option available for drinking water applications.

Materials and Structure

Body: hot-forged normal brass or lead-free brass. Disc: brass with PTFE sealing face. Spring: SS304 stainless steel. Seals: NBR or EPDM O-rings and gaskets.

Applications

Suitable for pumping systems, water supply, heating & boiler systems, agricultural irrigation, and industrial fluid lines.

Customization

OEM service available. Custom sizes, threads (BSP, PRESS, PEX, etc.), and materials can be accommodated.

FAQ

What is the pressure rating of this valve?

200 WOG (1.4 MPa).

Can this valve be installed vertically?

Yes, the spring inline design allows horizontal or vertical installation.

Is this valve certified for drinking water?

Yes, the lead-free version is NSF61 and NSF372 certified.

What connection types are available?

NPT is standard, but BSP, PRESS, PEX, and others are available.

What is the working temperature range?

-20°C to 150°C.

Do you offer OEM services?

Yes, OEM service is available.

Inquiry Information

For pricing and availability, contact us at sales@ld-valve.com.

Product Images

Lead-free brass spring inline check valve with NPT connections

Filename: npt-check-valve-lead-free-spring-inline.png