GA49H-DN20 Pulse Safety 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）
Applications and features
GA49H pulse safety valve is mainly used in power station boilers, all kinds of pressure vessels, temperature and pressure reduction devices and other equipments, to prevent pressure relief in time when the equipment pressure exceeds the allowable value, and ensure the safe operation of equipment. The main structural features of pulse valve are: 1, through the lever and the heavy hammer to smooth the disc pressure, makes the valve to ensure sealing, moves the heavy hammer position and changes the heavy hammer weight to meet the requirements of take-off pressure. 2, sealing surface is made of iron-based Cr-Ni stainless steel bead welding, after heat treatment, the disc improves wear resistance and anti-erosion. 3, the top of the valve has open and closed electromagnet, and mechanical motion and electrical motion will not disturb each other.
Dimensions & constructral diagram
pulse safety valve constructral diagram
External and connection dimensions(mm)
| Type | Nominal diameter DN | Connecting dimensions | |||||||||
| L | L1 | H | D | D1 | D2 | b | Z-d | DN | D’ | ||
| GA49H-PW466.7V | 20 | 280 | 170 | 225 | 130 | 90 | 35 | 28 | 4-23 | 20 | 28 |
| GA49H-PW5410V | 20 | 280 | 170 | 225 | 130 | 90 | 35 | 28 | 4-23 | 20 | 28 |
| GA49H-PW5410.5V | 20 | 280 | 170 | 225 | 130 | 90 | 35 | 28 | 4-23 | 20 | 28 |
Installtions instructions
1. GA49H pulse safety valve should be matched with A69Y-Pw5410V type, DN150 main safety valves for the use. 2. pulse safety valve installation should be strictly vertical, the lever should be maintained level, and we should washe clean pipelines. 3. The extract pipe of GA49H pulse safety valve should keep a longer distance with the inlet pipe of the main safety valve, the distance between electric contact pressure gauge and the inlet pipe of main safety valve should not less than five times of the inlet diameter of the main safety valve, in order to avoid affecting electric contact pressure gauge and pulse safety valve working correctness due to exhaust when the main valve moves. 4. GA49H pulse safety valve should be installed on a special support with electromagnet, the upper lever should be connected with electromagnet flexibly, without jam phenomenon.
