233AB LF Brass In-line Check Valve
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 |