Dry-Pipe Sprinkler System Equipment
Dry Pipe Alarm Valve
A differential-type water control valve for dry-pipe sprinkler systems in unheated or freezing environments. The downstream piping is kept charged with air or nitrogen instead of water; when a sprinkler opens and the system air pressure drops, the valve opens and floods the piping with water.
Flange drilling, system air-supply pressure and trim arrangement are confirmed against the approved drawing, sample or order schedule before production.
Technical overview
Confirmed construction and operating data
Critical product data is presented in HTML for clear international sourcing. The valve is type-tested to a national standard; no foreign approval is claimed on this page.
Series specifications
- Product type
- Differential Dry Pipe Alarm Valve
- Available sizes
- DN100 / 4 in to DN200 / 8 in
- Connection options
- Flanged
- Maximum working pressure
- 1.6 MPa / 16 bar / approx. 232 psi
- Air-to-water differential ratio
- approx. 5.5:1 to 7.25:1 (measured)
- Reset prevention
- Latching mechanism fitted
- Alarm device inlet pressure
- ≥ 0.05 MPa (measured 0.08–0.09 MPa)
- Valve body
- Ductile iron QT450-10 / ASTM A536 65-45-12
- Coating
- Internal and external epoxy coating (red)
- Weight
- Available on request
- Type-test standard
- GB 5135.4 (national dry-pipe-valve standard); no foreign approval implied
- Packaging
- Wooden case
Complete supply scope
Alarm trim supplied with the main valve
The standard complete assembly includes the items below. Customer-specified accessory makes or trim arrangements can be reviewed before quotation.
Available models
Configurations for quotation
International size and connection are the primary selection fields. ZSFC codes are retained only as factory references. Reference height may vary with the approved trim arrangement.
| International configuration | Nominal size | Maximum pressure | Reference height | Factory reference |
|---|---|---|---|---|
| Flanged Dry Pipe Alarm Valve | DN100 / 4 in | 1.6 MPa | 375 mm | ZSFC100 |
| Flanged Dry Pipe Alarm Valve | DN150 / 6 in | 1.6 MPa | 455 mm | ZSFC150 |
| Flanged Dry Pipe Alarm Valve | DN200 / 8 in | 1.6 MPa | 610 mm | ZSFC200 |
OEM / ODM capability
Configured to the approved drawing or sample
Manufacturing and assembly options are confirmed against the buyer's technical schedule. Connection-standard names describe available machining patterns and do not imply third-party product approval.
Send your dry pipe valve schedule
Include size, air-supply pressure, trim configuration, quantity and destination country.
