Concealed Pendent · Standard & Quick Response
Concealed Pendent Fire Sprinklers
A flush-finish pendent sprinkler family for ceiling installations, available in standard response and quick response versions. Select the response type, nominal size, K-factor and temperature required for the project.
Factory references are shown only for production and repeat-order matching. Cover configuration, thread, marking and documentation are confirmed against the approved order.
Product presentation
Mechanism, cover and temperature samples.
Review the concealed sprinkler mechanism, cover plate assembly and real product samples with different glass-bulb temperature colors. The product markings remain visible for model identification.
Technical overview
Two response options in one family.
The standard response version uses a 5 mm glass bulb. The quick response version uses a 3 mm glass bulb. Both are available in DN15 and DN20 configurations.
Product specifications
- Product type
- Concealed Pendent Fire Sprinkler
- Response options
- Standard Response or Quick Response
- Thermal element
- 5 mm glass bulb for Standard Response; 3 mm glass bulb for Quick Response
- Nominal sizes
- DN15 / ½ in; DN20 / ¾ in
- K-factor
- K5.6 US / K80 metric; K8.0 US / K115 metric
- Temperature options
- 57°C / 135°F, 68°C / 155°F, 79°C / 175°F, 93°C / 200°F, 141°C / 286°F
- Frame material
- Copper
- Surface finish
- Chrome-plated or natural copper finish
- Thread form
- Manufactured to the confirmed customer drawing or approved sample
- Max. working pressure
- 1.2 MPa / 12 bar / approx. 175 psi
- Standard packing
- 100 pcs per export carton
- System application
- Wet-pipe automatic sprinkler systems with concealed pendent installation
- Compliance
- Documentation reviewed according to the confirmed order and destination market; no foreign approval is implied
Available configurations
Models you can order
Choose the response type and nominal size first, then specify temperature, finish, thread and marking. Factory references remain secondary production identifiers.
| Response type | Nominal size | K-factor | Temperature options | Factory reference |
|---|---|---|---|---|
| Standard Response5 mm glass bulb | DN15 / ½ in | K5.6 US / K80 metric | 57, 68, 79, 93, 141°C | ZSTDY 80 / Q5A |
| Standard Response5 mm glass bulb | DN20 / ¾ in | K8.0 US / K115 metric | 57, 68, 79, 93, 141°C | ZSTDY 115 / Q5A |
| Quick Response3 mm glass bulb | DN15 / ½ in | K5.6 US / K80 metric | 57, 68, 79, 93, 141°C | ZSTDY 80 / Q3A |
| Quick Response3 mm glass bulb | DN20 / ¾ in | K8.0 US / K115 metric | 57, 68, 79, 93, 141°C | ZSTDY 115 / Q3A |
OEM / ODM support
Concealed sprinklers configured for your order.
Product marking, chrome-plated or natural copper finish, thread form, cover configuration and export packaging can be reviewed against the selected model and approved sample.
Send us your concealed sprinkler requirement.
Include response type, size, temperature, thread, finish, cover requirement, quantity and destination country.