D743H,D741X Heavy hammer hydraulic butterfly valveDetailed product description：

D743H, D741X Heavy Hammer Hydraulic Control Butterfly Valve Execution Standard
Design according to the provisions of GB12238
Flanges shall comply with the provisions of GB/T9113 and GB/T17241.6
The structural length shall be in accordance with the provisions of GB12221
The pressure test shall be conducted in accordance with the provisions of GB/T13927 and JB/T9092

Main performance specifications

Nominal pressure	PN	ANSI
	0.6~4.0MPa	150LB~300LB
strength test	1.5 times
Hydraulic sealing test	1.1 times
Air pressure sealing test	0.6MPa
Valve body material	Carbon steel C gray cast iron Z ductile iron Q
Operating Temperature	-29~425℃
Applicable Medium	Water, seawater, oil products, etc

structural characteristics
1. This valve is a new generation hydraulic butterfly valve, mainly used for the pump outlet of pipeline systems with water as the medium. It has the functions of shut-off and check closure, which can replace two valves with one valve. When the check closure of this valve is achieved, it can achieve fast and slow two-stage closure, thereby eliminating or reducing water hammer and preventing medium backflow to protect the pipeline system.
2. This valve replaces the heavy hammer of the hydraulic disc valve with an accumulator, and uses the pressure energy of the liquid to store energy instead of the potential energy of the heavy hammer, making the valve have the advantages of reasonable design, small volume, light weight, and easy maintenance.
3. The hydraulic station and electrical control box of this valve can be installed as a whole or separately from the lower part of the valve, and the valve can be selected under different working conditions.
4. This valve adopts a three eccentric metal sealing structure, which can easily achieve zero leakage when opened and closed.

Product Use
This butterfly valve is suitable for pump outlet pipelines with water as the medium, used to avoid and reduce the backflow of the medium and excessive water hammer in the pipeline system, in order to protect the pipeline system. Its function is to replace two valves with one valve (traditional pipeline design uses gate valves with check valves or ordinary butterfly valves with check valves)

Butterfly valve flow coefficient table

Nominal diameter DN	mm	two hundred	two hundred and fifty	three hundred	three hundred and fifty	four hundred	four hundred and fifty	five hundred
	in	eight	ten	twelve	fourteen	sixteen	eighteen	twenty
Flow coefficient Cv		two thousand two hundred and fifty-six	three thousand one hundred and seventy-eight	four thousand nine hundred and forty-two	six thousand three hundred and seventeen	eight thousand six hundred and four	eleven thousand and fifty-three	thirteen thousand eight hundred and fifty
Nominal diameter DN	mm	six hundred	seven hundred	eight hundred
	in	twenty-four	twenty-eight	thirty-two
Flow coefficient Cv		twenty-one thousand four hundred and eighty-nine	thirty-three thousand eight hundred and sixty-six	forty-two thousand six hundred and thirty-eight

Note: Cv value is measured under standard conditions where the pressure drop at both ends of the valve is IPSI.