Specification
Unless otherwise agreed, the drawing and specification of standard Sinomas NPT fusible plugs are as follows:
Thread sizes | H(mm) | T(mm) | S(mm) | φ(mm) |
1/8"NPT | 16 | 5 | 12 | 5 |
1/4"NPT | 21 | 6.5 | 14 | 5 |
3/8"NPT | 20 | 6 | 17 | 7 |
1/2"NPT | 29 | 8 | 22 | 8 |
φ stands for the diameter of the central venting hole.
HS code:8481809000
Yield temperature: per specified
Tolerance of yield temperature: ±3K(normally within ±1.5K)
Material of plug body: Brass or stainless steel
Alloy: eutectic alloy with several components
Test pressure: 3.5 MPa (high pressure upon request)
Max service pressure: 10 MPa for brass, 50 MPa for stainless steel
Checklist
Please supply the following information when you order fusible plugs from us:
- plug body material
- yield temperature
- thread specification
- drawing (if different from the drawing above)
- other requirements
- order quantity
Material certificate and test report can be supplied upon request. Minor service fee may be charged depending on your requirement and order quantity.
Application note:
- We make sure that all our products function as they are designed to be. However it is the customer's responsibility to choose the right fusible plug for their application.
- Apply anaerobic sealing adhesive or thread sealing tape for installation to avoid leakage.
- Please check with us if the service pressure of your application is higher than 5.0 Mpa.
- Fusible plug does not protect against over-pressure from improper charging practices. In other words, fusible plugs only operate on over temperature instead of over pressure.
- We strongly recommend to replace the fusible plug after 12 - 18 months of service.
809 Haixiang Tower, 26 Zhoukang Road, Pudong Shanghai 201318, China - Tel: (+86) 21 6089 1049 - Fax: (+86) 21 60891081 - Email: inquiry@sinomas.com