Name: FM Approved 68 Degree Fire Sprinkler
Brand: FOREDE
SKU: 281376160

Description

Technical Parameters

Products Description

FM Approved 68 Degree Fire Sprinkler

The FM Approved 68°C fire sprinkler is a critical component in modern fire suppression systems, designed to activate precisely at 68°C (154.4°F) to control or extinguish fires in residential, commercial, and industrial settings. Endorsed by FM Global, a leading authority on industrial risk management, this sprinkler meets stringent performance standards for thermal sensitivity, durability, and water distribution efficiency.

The 68°C rating signifies the sprinkler's ability to activate when ambient temperatures reach this threshold, typically due to a fire. This temperature is optimized for environments where rapid heat buildup is expected, such as kitchens, boiler rooms, or manufacturing facilities. The sprinkler's glass bulb or fusible link contains a heat-sensitive liquid or alloy that expands or melts at 68°C, releasing a plug and allowing water to flow. FM Approval guarantees consistent activation within ±3°C of the rated temperature, minimizing false discharges or delayed responses.

Products Specification

Features

Sensitive Element: JOB® Brand Glass Bulb;

Main Material: Brass;

Seal Material: NBR;

Surface Finishing: Chrome.

Approved: FM Approved

Model Number	Connection	K Factor	Temperature	Response
T-ZSTX 80-57°C Q5 J	1/2" (DN15) BSP/NPT	K5.6@US (80@Metric)	57°C	Standard
T-ZSTX 80-68°C Q5 J	1/2" (DN15) BSP/NPT	K5.6@US (80@Metric)	68°C	Standard
T-ZSTX 80-79°C Q5 J	1/2" (DN15) BSP/NPT	K5.6@US (80@Metric)	79°C	Standard
T-ZSTX 80-93°C Q5 J	1/2" (DN15) BSP/NPT	K5.6@US (80@Metric)	93°C	Standard
T-ZSTX 80-141°C Q5 J	1/2" (DN15) BSP/NPT	K5.6@US (80@Metric)	141°C	Standard

FAQ

1.Why is the activation temperature set at 68°C (154.4°F)?

68°C is optimal for environments where rapid heat buildup occurs (e.g., kitchens, boiler rooms), ensuring timely activation without false discharges.

2. How does a 68°C sprinkler activate?

It uses a heat-sensitive glass bulb or fusible link that breaks/melts at 68°C, releasing a plug to allow water flow

3. What is the tolerance for activation temperature in FM Approved sprinklers?

FM requires activation within ±3°C of the rated temperature (e.g., 65°C–71°C for a 68°C sprinkler).

4. What is the K-factor, and why is it important?

The K-factor (e.g., K5.6, K8.0) determines water flow rate at a given pressure. Higher K-factors provide greater coverage but may increase water damage.

5. Can a 68°C sprinkler be used in dry-pipe systems?

Yes, FM Approved 68°C sprinklers are compatible with both wet- and dry-pipe systems, making them suitable for unheated spaces.