We are able to produce any fusible plugs according to customer specifications including thread type and sizes, plug body material, etc. In practice NPT fusible plugs of the following sizes and yield temperatures are considered to be standard models due to their popularity in application. These plug bodies, both brass and stainless steel, are often in stock, resulting in shorter delivery times.
Standard Model List
#| °F | °C | 1/8″NPT | 1/4″NPT | 3/8″NPT | 1/4″NPT | 1/4″NPT | 3/8″NPT | 1/2″NPT |
|---|
| | Brass | Brass | Brass | Brass | SS | SS | SS |
| 136 | 58 | AQS18-58 | AQS14-58 | AQS38-58 | AQS12-58 | AQS14-58SS | AQS38-58SS | AQS12-58SS |
| 160 | 71 | AQS18-71 | AQS14-71 | AQS38-71 | AQS12-71 | AQS14-71SS | AQS38-71SS | AQS12-71SS |
| 165 | 74 | AQS18-74 | AQS14-74 | AQS38-74 | AQS12-74 | AQS14-74SS | AQS38-74SS | AQS12-74SS |
| 180 | 82 | AQS18-82 | AQS14-82 | AQS38-82 | AQS12-82 | AQS14-82SS | AQS38-82SS | AQS12-82SS |
| 195 | 90 | AQS18-90 | AQS14-90 | AQS38-90 | AQS12-90 | AQS14-90SS | AQS38-90SS | AQS12-90SS |
| 212 | 100 | AQS18-100 | AQS14-100 | AQS38-100 | AQS12-100 | AQS14-100SS | AQS38-100SS | AQS12-100SS |
| 230 | 110 | AQS18-110 | AQS14-110 | AQS38-110 | AQS12-110 | AQS14-110SS | AQS38-110SS | AQS12-110SS |
| 255 | 124 | AQS18-124 | AQS14-124 | AQS38-124 | AQS12-124 | AQS14-124SS | AQS38-124SS | AQS12-124SS |
| 281 | 138 | AQS18-138 | AQS14-138 | AQS38-138 | AQS12-138 | AQS14-138SS | AQS38-138SS | AQS12-138SS |
| 361 | 183 | AQS18-183 | AQS14-183 | AQS38-183 | AQS12-183 | AQS14-183SS | AQS38-183SS | AQS12-183SS |
| 390 | 199 | AQS18-199 | AQS14-199 | AQS38-199 | AQS12-199 | AQS14-199SS | AQS38-199SS | AQS12-199SS |
| 445 | 229 | AQS18-229 | AQS14-229 | AQS38-229 | AQS12-229 | AQS14-229SS | AQS38-229SS | AQS12-229SS |
Dimensions
#
| Thread Size | H(mm) | T(mm) | S(mm) | Orifice(mm) |
|---|
| 1/8"NPT | 16 | 5 | 12 | 5 |
| 1/4"NPT | 21 | 6.5 | 14 | 5 |
| 3/8"NPT | 20 | 6 | 17 | 6 |
| 1/2"NPT | 29 | 8 | 22 | 8 |
Product Specifications
#- Tolerance of yield temperature: ±3°C
- Plug body material: brass / stainless steel
- Eutectic alloy consisting of multiple components
- Test pressure: 3.0 MPa (higher pressure upon request)
- Max service pressure: 5 MPa for brass, 15 MPa for stainless steel
- HS code: 8481809000