ZSX-40 Pneumatic Unloading (Relief) Valve
The catalog identifies ZSX-40 as a pneumatic unloading (relief) valve and lists water service, 4 MPa working pressure, a maximum operating temperature of 65°C, and a pilot-to-fluid pressure condition of approximately 1:5.
Product features
The catalog shows both flanged and threaded constructions. Page 12 lists a 1-inch specification and the basic operating conditions. Page 13 provides flange dimensions for DN15–DN40 and threaded dimensions for ZG3/4, ZG1 and ZG1-1/2. Different connection constructions are not automatically treated as one SKU.
Operating data
| Item | Value |
|---|---|
| Model | ZSX-40 |
| Catalog size | 1 in |
| Medium | Water |
| Working pressure | 4 MPa |
| Operating temperature | ≤65°C |
| Operating condition | Pilot pressure:fluid pressure ≈1:5 |
Flanged connection dimensions
| DN | L | D1 | D2 | D3 | D4 | b | z-d | f |
|---|---|---|---|---|---|---|---|---|
| 15 | 120 | φ51 | φ55 | φ75 | φ105 | 16 | 4-φ14 | 4 |
| 20 | 120 | φ51 | φ55 | φ75 | φ105 | 16 | 4-φ14 | 4 |
| 25 | 120 | φ58 | φ65 | φ85 | φ115 | 16 | 4-φ14 | 4 |
| 32 | 200 | φ76 | φ85 | φ110 | φ145 | 16 | 4-φ18 | 4 |
| 40 | 200 | φ76 | φ85 | φ110 | φ145 | 16 | 4-φ18 | 4 |
Threaded connection dimensions
| D | L | H |
|---|---|---|
| ZG3/4 | 130 | 100 |
| ZG1 | 130 | 100 |
| ZG1-1/2 | 150 | 135 |
Applications
For catalog-listed unloading or relief control in water service, with the connection construction confirmed during RFQ.