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Specifications
Description
The Watts LF530-C 3/4 is a 1/2" lead-free calibrated adjustable pressure relief valve for thermal expansion / general service service, field-adjustable over 100-300 psi. It features a brass body. Rated to 300 psi. This model is certified lead-free for potable-water installations.
This 3/4 inch lead free calibrated pressure relief valve is designed for use only as protection from the build up of excessive pressure in systems containing water, oil or air. It features a lead free brass body with 3/4 inch NPT male inlet and 1/2 inch NPT female (drain) outlet, stainless steel spring, lead free brass bonnet and a Buna-N disc and O-ring. The pressure relief spring adjustable range is 100 to 300 psi (6.9 to 20.7 bar).
Features
- Lead free brass body construction
- All stainless steel adjustable spring
- Adjustable range 100 to 300 psi
- Buna-N disc on machined body seat
Common Questions
- What pressure does this relieve at?
- This is a calibrated valve — you set it. It adjusts over 100-300 psi, so it has no factory set point. Set it below the working pressure rating of the equipment you are protecting, and re-check the setting after installation.
- Is this ASME rated?
- No. This is a calibrated relief valve and is explicitly not ASME approved, so it may not be used as the code-required safety relief on a boiler or a water heater. It is intended for thermal expansion and general bypass duty. Where an ASME valve is required, specify one that carries the HV stamp.
- Can I use this on potable water?
- Yes. It is certified lead-free to NSF/ANSI 372, which is what plumbing codes require for any device in a drinking-water line.
Specifications
- Type: Relief
- Size: 1/2"
- Inlet Size: 3/4"
- Outlet Size: 1/2"
- Connection: NPT
- Body Material: Brass
- Max Pressure (psi): 300
- Pack Quantity: 50
- Country of Origin: United States
- Warranty: 1 Year Limited
- MPN: LF530-C 3/4
- Lead-Free: Yes
- Relief Type: Calibrated Adjustable
- Adjustment Range: 100-300 psi
- ASME Code Rating: Not ASME Rated
- Application: Thermal Expansion / General Service
- Connection Configuration: MNPT inlet x FNPT outlet
- Approved for Potable Water: Yes
- SentryPlus Alert Flood Sensor: No
Product Information
Dimensions
| Size Nominal | 1/2" | Inlet Size | 3/4" |
| Outlet Size | 1/2" | End Connection | NPT |
Details
| Series | LF530C | Device Type | Relief |
| Lead Free | Yes | Body Material | Brass |
| Max Pressure PSI | 300.0 psi | Pack Qty | 50 |
| Relief Type | Calibrated Adjustable | Adjustable Range PSI | 100-300 psi PSI |
| ASME Rating | Not ASME Rated | Application Class | Thermal Expansion / General Service |
| Connection Config | MNPT inlet x FNPT outlet | Potable Approved | Yes |
Compare with similar products
| Relief Type | Calibrated Adjustable
| Calibrated Adjustable
| Calibrated Adjustable
| Calibrated Adjustable
|
| Adjustable Range PSI | 100-300 psi
| 45-100 psi
| 100-300 psi
| 10-50 psi
|
| ASME Rating | Not ASME Rated
| — | Not ASME Rated
| — |
| Application Class | Thermal Expansion / General Service
| Pump Bypass Pressure Control
| Thermal Expansion / General Service
| Pump Bypass Pressure Control
|
| Connection Config | MNPT inlet x FNPT outlet
| MNPT inlet x FNPT outlet
| MNPT inlet x FNPT outlet
| MNPT inlet x FNPT outlet
|
| Potable Approved | Yes | Yes | — | Yes |
| Series | LF530C
| LFBP30
| 530C
| LFBP30
|
| Country Of Origin | United States
| United States
| United States
| United States
|
| Warranty | 1 Year Limited
| 1 Year Limited
| 1 Year Limited
| 1 Year Limited
|
| Spec Sheet | ||||
| Install Sheet | — | — | ||
| Device Type | Relief
| Relief
| Relief
| Relief
|
| Size Nominal | 1/2"
| 1/2"
| 1/2"
| 1/2"
|
| Inlet Size | 3/4"
| 1/2"
| 3/4"
| 1/2"
|
| Outlet Size | 1/2"
| 1/2"
| 1/2"
| 1/2"
|
| Lead Free | Yes | Yes | — | Yes |
| End Connection | NPT
| NPT
| NPT
| NPT
|
| Body Material | Brass
| Copper
| Brass
| Copper
|
| Max Pressure PSI | 300.0 psi | 100.0 psi | 300.0 psi | 50.0 psi |
| Max Temp °F | — | 180.0 °F | 180.0 °F | 180.0 °F |
| Pack Qty | 50
| 12
| 50
| 12
|
| Options | — | Bypass
| — | Bypass
|
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