H49X micro resistance slow closing check valve
HH46/48/49X微阻缓闭止回阀
1、 Product Overview
HH49X micro resistance slow closing check valve is a valve designed specifically for water supply and drainage systems, mainly used to prevent medium backflow and eliminate water hammer effects, protecting pipeline and pump equipment safety.
2、 Core functions and features
Water hammer protection
By using a slow closing device to close the valve disc in two steps (quickly closing 80% first, and then slowly closing the remaining 20%), the impact of water hammer is effectively reduced.
Structural advantages
The volume is only one-third of that of traditional swing check valves, with light weight and low fluid resistance.
Rubber soft seal design, wear-resistant and reliable sealing.
Energy saving effect
The flow resistance coefficient is significantly lower than that of old-fashioned check valves, and the energy-saving effect is obvious.
Technical Specifications
Parameter specifications
Nominal pressure PN1.0/1.6MPa
Applicable media: clean water, sewage, seawater (excluding solid particles)
Temperature range ≤ 80 ℃ (regular model)
Sealing test pressure 1.1/1.76MPa (corresponding to PN grade)
Valve body material: ductile iron, cast steel or stainless steel
