RED-WHITE VALVE CORP.  |  SKU: 30078047  |  MPN: 233AB 1/2

233AB LF Brass In-line Check Valve

$27.80
Size
$50 minimum order required

🧪 FPM Chemical Resilience
Fluoropolymer seat resists oils, fuels, and chemicals—ideal for industrial pipelines and harsh environments.

🔩 ISO-Certified Spring Durability
SS304 spring (ISO 6931-1) ensures corrosion-free performance in marine or high-humidity installations.

🌐 Global Compliance Assurance
Exceeds AB1953 + NSF/ANSI 61/372 for California and international potable water projects.

🔥 Fire-System Ready
Solder ends (ASME B16.22) guarantee leak-proof integrity in fire suppression and municipal water systems.

The 233AB LF Brass Check Valve delivers reliable backflow prevention in residential, commercial, and industrial systems. Constructed from lead-free brass and certified to NSF/ANSI 61 & 372, this valve meets stringent safety standards for potable water applications. Its spring-loaded mechanism and FPM soft seat ensure quiet, leak-proof performance, making it ideal for HVAC, plumbing, and fluid systems where noise reduction and durability are critical.

Key Features

 Certified Safe & Lead-Free

  • Compliant with AB1953 and NSF/ANSI 61 & 372 for drinking water safety.
  • Lead-free brass body aligns with California’s BAA and global health regulations.

 Durable, Low-Noise Performance

  • FPM Soft Seat & Low-Lead Brass Disc: Ensures tight sealing, chemical resistance, and whisper-quiet operation.
  • SS304 Stainless Steel Spring: Corrosion-resistant for long-term reliability in harsh environments.

 Flexible Installation

  • Horizontal or Vertical Mounting: Adaptable to tight or complex layouts.
  • Solder Ends (ASME B16.22): Permanent, leak-proof joints for hassle-free integration with copper piping.

 Industrial-Grade Construction

  • 200# WOG Rating: Built to withstand water, oil, and gas under high pressure (200 PSI).
  • Low-Lead Brass Disc: Enhances durability while meeting strict lead-content regulations.

Technical Specifications

  • Material: Lead-Free Brass (Body, Disc), FPM (Seat), SS304 (Spring)
  • End Connections: Solder x Solder (ASME B16.22)
  • Pressure Rating: 200 PSI WOG
  • Certifications: AB1953, NSF/ANSI 61 & 372

Ideal For

  • Residential/commercial plumbing systems
  • HVAC and refrigeration units
  • Industrial water, oil, or gas pipelines
  • Municipal water supply and fire suppression systems

Why Choose This Valve?

The 233AB LF combines safety, durability, and versatility, making it a top choice for contractors and engineers prioritizing compliance and performance. Its corrosion-resistant spring and solder ends ensure leak-proof reliability, while certifications guarantee adherence to the strictest health and safety standards.

Order Today – Secure your systems with a valve trusted for critical applications!

Dimension, Cv, Weight

Size D A [in] W [in] C [in] Cv [USG/min] Wt. [lb] Nominal Pressure [psi] Min. working Dp [psi]
½" 0.627-0.631 2.16 1.13 0.51 2.65 0.22 400 0.5
¾" 0.877-0.881 2.75 1.43 0.75 5.44 0.37 400 0.5
1" 1.128-1.132 3.39 1.76 0.91 11.5 0.62 400 0.5
1¼" 1.378-1.382 3.69 2.22 0.98 20.2 0.95 400 0.5
1½" 1.628-1.633 4.07 2.56 1.10 30.0 1.35 400 0.5
2" 2.128-2.133 4.84 3.22 1.34 48.5 2.14 400 0.5
Pressure/Temperature Rating
1/2" - 2" 400 psi from 15 °F to 200 °F
3" 200 psi from 15 °F to 200 °F
Connection Working Pressure
Solder used in joint Working temp (°F) Max. working pressure (PSI)
½" - 1" 1¼" - 2" 2½" - 3"
95-5 Tin antimony (ASTM B32 grade 95TA) 100 500 400 300
150 400 350 275
200 300 250 200
250 200 175 150

Material

No. Part Material Specification
1 Body Lead Free Brass ASTM B927 C27450
2 End piece Lead Free Brass ASTM B927 C27450
3 Stem Lead Free Brass ASTM B927 C27450
4 Shutter disk Lead Free Brass ASTM B927 C27450
5 Gasket EPDM Perox NSF Approved
6 Retaining disk Lead Free Brass ASTM B927 C27450
7 Spring Stainless Steel ISO 6931-1 4310-301-00-I-NS