Product Description
The YZ11X stainless steel Branch-Type Pressure Reducing Valve is a direct-acting diaphragm pressure reducing valve, representing an improved version of the original model of the same type. It consists primarily of a diaphragm, valve disc, spring, and other components. The diaphragm senses changes in downstream pressure to drive the valve disc up or down, thereby adjusting the valve opening to achieve pressure reduction and stabilization. This ensures more uniform water pressure distribution, prevents overpressure in certain supply lines, and optimizes water supply zoning in high-rise buildings. It is primarily used in various building water systems, fire protection systems, central air conditioning systems, and heating systems.
Product Features
- Featuring a direct-acting diaphragm design, it has a very simple internal structure, is jam-free, and offers reliable performance and long-lasting durability.
- Resistant to dirt and scale, requires no filter or bypass pipe, and is extremely easy to install, saving significant space and installation costs.
- The outlet pressure is precisely adjustable; under normal conditions, it can be assumed that the outlet pressure is minimally affected by the inlet pressure.
- Excellent hydraulic performance, low pressure loss, and a pressure reduction ratio of 10:1 or higher.
- The enlarged and reinforced valve body provides low-pressure, high-flow pressure-reducing capabilities, meeting a wide range of pressure-reduction requirements, and is particularly suitable for branch pressure-reducing valve systems.
Installation Diagram

The pressure-reducing valve can be installed in any orientation (360°), but the arrow cast on the valve body must point in the direction of actual water flow.
Important Notes
- Turn the adjustment screw clockwise until the outlet pressure gradually rises to the desired level, then stop turning. (After pressure reduction, the maximum outlet pressure is 0.55 MPa; once this pressure is exceeded, it becomes difficult to turn the adjustment screw further. Note: Excessive force may cause the diaphragm to rupture.)
- Turn the flat-head adjustment screw counterclockwise until the outlet pressure gradually drops to the desired level, then stop turning. (To reduce the pressure, turn the flat-head adjustment screw counterclockwise; if the outlet pressure does not change, you must relieve the pressure downstream of the valve to lower it.)
Product Specifications
Product Model | YZ11X-16P |
Valve Body Material | 304 Stainless Steel |
Nominal Pressure | ≤1.6 MPa |
Applicable Media | Water, etc. |
Operating Temperature | ≤80℃ |
Product Size Guide

Nominal Diameter | L | H1 | H2 | G |
DN15 | 76.5 | 31 | 60 | 59 |
DN20 | 76.5 | 31 | 75 | 76 |
DN25 | 85 | 36 | 88 | 81 |
DN32 | 98 | 42 | 93 | 81 |
DN40 | 102 | 45 | 98 | 85 |
DN50 | 117 | 54 | 130 | 98 |

















