High-Flow Spray · Storage Protection
Large K-Factor & ESFR Sprinklers
Two related but distinct product groups: large K-factor spray sprinklers for higher discharge capacity, and fusible-link ESFR sprinklers for storage-protection applications. Each group is identified separately for accurate sourcing.
Large K-factor does not by itself define an ESFR sprinkler. ESFR project suitability, hydraulic design and installation criteria remain subject to the exact product technical data.
Product presentation
Spray and ESFR configurations.
The gallery separates chrome-plated large K-factor glass-bulb sprinklers from natural-copper ESFR fusible-link sprinklers. Similar-looking ESFR models are presented as series views unless the exact K-factor is visible or otherwise confirmed.
Technical overview
Two product groups, clearly separated.
International K-factor values are paired with the metric values used in factory records. Pricing and domestic quotation-sheet language are omitted.
Large K-Factor Spray Sprinklers
- Available K-factors
- K11.2 US / K161 metric; K14.0 US / K202 metric
- Response options
- Standard response with 5 mm bulb; quick response with 3 mm bulb for K161 models
- Temperature
- 68°C / 155°F
- Installation
- Upright and pendent; horizontal sidewall available for K202
- Nominal connection
- DN25 / 1 in NPT
- Frame material
- Copper
- Surface finish
- Chrome-plated
- Max. working pressure
- 1.2 MPa / 12 bar / approx. 175 psi
- Standard packing
- 100 pcs per export carton
Available configurations
Models you can order
Factory references are shown for production matching. Overseas buyers can select by product group, response type, K-factor, orientation, connection and temperature.
Large K-Factor Spray Sprinklers
| Product configuration | K-factor | Connection | Thermal element | Factory reference |
|---|---|---|---|---|
| Standard Response Upright | K11.2 / K161 | DN25 / 1 in NPT | 5 mm bulb · 68°C | T-ZSTZ161-68°C Q5 |
| Standard Response Pendent | K11.2 / K161 | DN25 / 1 in NPT | 5 mm bulb · 68°C | T-ZSTX161-68°C Q5 |
| Quick Response Upright | K11.2 / K161 | DN25 / 1 in NPT | 3 mm bulb · 68°C | K-ZSTZ161-68°C Q3 |
| Quick Response Pendent | K11.2 / K161 | DN25 / 1 in NPT | 3 mm bulb · 68°C | K-ZSTX161-68°C Q3 |
| Standard Response Upright / Pendent | K14.0 / K202 | DN25 / 1 in NPT | 5 mm bulb · 68°C | ZSTZ.X202-68°C Q5 |
| Standard Response Horizontal Sidewall | K14.0 / K202 | DN25 / 1 in NPT | 5 mm bulb · 68°C | ZSTBS202-68°C Q5 |
ESFR Storage Sprinklers
| Product configuration | K-factor | Connection | Operating element | Factory reference |
|---|---|---|---|---|
| ESFR Upright | K14.0 / K202 | DN20 / ¾ in NPT | Fusible alloy · 74°C | ESFR-202/74°C UY |
| ESFR Pendent | K14.0 / K202 | DN20 / ¾ in NPT | Fusible alloy · 74°C | ESFR-202/74°C PY |
| ESFR Upright | K16.8 / K242 | DN20 / ¾ in NPT | Fusible alloy · 74°C | ESFR-242/74°C UY |
| ESFR Pendent | K16.8 / K242 | DN20 / ¾ in NPT | Fusible alloy · 74°C | ESFR-242/74°C PY |
| ESFR Upright | K25.2 / K363 | DN25 / 1 in NPT | Fusible alloy · 74°C | ESFR-363/74°C UY |
| ESFR Pendent | K25.2 / K363 | DN25 / 1 in NPT | Fusible alloy · 74°C | ESFR-363/74°C PY |
OEM / ODM support
Configured for your product program.
Model marking, thread form and export packaging can be reviewed against the selected sprinkler configuration and approved technical requirement.
Send us your sprinkler requirement.
Include destination country, product group, K-factor, orientation, connection, quantity and required hydraulic documentation.