Product Features
- Stacked structure
- Mounting surface complies with DIN 24340 Type A and ISO4401
- For threaded connection, for baseplate mounting
-3 pressure ranges
- 4 optional effective flow directions
- With one or two plug-in pressure relief valves
-1 adjustment form
Adjusting bolt with protective cover
The ZDBD type stacking relief valve is a stacking mounted direct acting relief valve used to limit system pressure. It consists of a valve body (1) and one or two relief valve plug-ins. The relief valve plug-in mainly includes a valve sleeve (2), a spring (3), a cone valve core (4), an adjusting device (5) and a valve seat (6).
If the pipeline pressure exceeds the set value of the spring (3), the cone valve core (4) opens. If the pipeline pressure is lower than the set value of the spring (3), the spring (3) presses the cone valve core (4) onto the valve seat (6). When the difference between the set pressure and the actual pipeline pressure reaches a certain value, a leak-free seal can be achieved between the cone valve core (4) and the valve seat (6), thereby cooperating with the hydraulic lock to prevent the working cylinder from falling due to its own weight when it is in the stop position.
This product is particularly suitable for use as a safety valve for actuators that require stacking installation and have strict control requirements on internal leakage.
Working medium temperature range |
ºC |
-30 ~+80 (NBR seals) |
-20 ~+80 (Fluorine Rubber Seal) |
Nominal pressure |
bar |
315 |
Maximum flow rate |
L/min |
30(6)/80(10)/160(16)/205(22)/250(32) |
Working medium |
Mineral oil; phosphate ester |
Viscosity range |
mm2/s |
10~800 |
Oil contamination degree |
Maximum oil contamination according to NAS 1638 Class 9 and ISO 4406 Class 20/18/15 |
Weight |
kg |
2~57 |
Hebei Ding'an Hydraulic Machinery Co., Ltd. is a professional company integrating the research, production and sales of hydraulic valves. It is an ISO9001:2000 quality management system certified enterprise. The company currently has fixed assets of more than 10 million yuan, covers an area of 16,000 square meters, has strong technical force, and has more than ten years of experience in the development and production of hydraulic valves. It can quickly and high-quality develop various mining and engineering machinery hydraulic valves according to customer requirements.