Internal Thread High Sensitivity Steam Reducing Valve
manufacturer: Shanghai MeiYan Yi Pump & Valve Co., Ltd.
Eml: sales@1bengfa.com
Tel: +86 (21) 5640 2009
Mob: +86 138 1691 3072（WeChat Same Account）
product drawing
Internal thread high sensitivity steam reducing valves
Structural features and function
This series of pressure relief valve belongs to pilot piston reducing valve. It consist of two parts the main valve and pilot valve. The main valve is mainly constituted by seat, main valve disc, piston and springs. Pilot Valve consists mainly of seat and disc diaphragm, spring, adjust springs. Through adjusting spring pressure regulating outlet pressure, using diaphragm sensing outlet pressure changes,
And through the pilot valve on-and-off driven piston to adjust the size of flowing area at the throttle part, realizing pressure reducing and stabilizing function.
This series of products is based on the ordinary reducing valve on the following improvement, increase the piston area, changed the throttle structure, change the sealing, improved the pilot valve structure and
Adjusting spring form, thus to improve the performance of the product from the following aspects.
1 improve the sense efficiency of the outlet pressure changes,and improve the sensitivity, greatly reduce the stress error due to the change of upstream pressure, flow changes and etc.
2 improve the flow distribution and reduce the noise.
3.Improved seal structure and prolong the life.
This product is mainly used for steam pipe, applicable to the steam pipe with big inlet pressure change and big flow change.
Dimensions & constructral diagram
Internal thread high sensitivity steam reducing valve constructral diagram
Main technical parameter and performance norm
| nominal pressure (Mpa) | 1.0 | 1.6 |
| casing body test pressure(Mpa)* | 1.5 | 2.4 |
| sealing test pressure (Mpa) | 1.0 | 1.6 |
| max. inlet pressure (Mpa) | 1.0 | 1.6 |
| outlet presure range (Mpa) | 0.04-0.6 | 0.04-1.0 |
| pressure property deviation (Mpa)△Pp2P | GB12246-1989 | |
| flow property deviation (Mpa)P2G | GB12246-1989 | |
| min. pressure difference (Mpa) | 0.05 | 0.07 |
| leakage quantity | GB12245-1989 | |
Material of main parts
| name of part | material of parts |
| body, bonnet, bottom cap | WCB |
| valve seat, disc | 2Cr13 |
| cylinder sleeve, piston | Al-Fe bronze |
| diaphragm | PH15-7Mo |
| piston ring | para-position polyphenyl |
| pilot seat, pilot valve disc | 2Cr13 |
| main valve spring | 50CrVA |
| pilot main spring | 50CrVA |
| adjust spring | 60Si2Mn |
Flowrate factor (Cv)
| DN | 15 | 20 | 25 | 32 | 40 | 50 |
| Cv | 1 | 2.5 | 4 | 6.5 | 9 | 16 |
YG13H/Y series connective dimensions
| nominal diameter | G | L | H | H1 |
| 15 | 1/2" | 140 | 160 | 65 |
| 20 | 3-4" | 140 | 160 | 65 |
| 25 | 1" | 160 | 168 | 68 |
| 32 | 1-1/4" | 180 | 185 | 75 |
| 40 | 1-1/2" | 200 | 185 | 78 |
| 50 | 2" | 230 | 193 | 88 |
