1- Product Overview
The OSS2 supervisory switch serves to monitor the open position of the OS&Y gate valve, with two available sizes, one for OS&Y gate valve size 2″~16″(DN50~DN400) and one for OS&Y gate valve size 18″ ~24″(DN450~DN600). While the OS&Y gate valve is opening, the groove on the stem rises accordingly. When it rises to the position of the trip rod, the trip rod falls into the groove, trigger off the tamper switch and deliver out signal
| Description | |
| Design Standard | UL 346 |
| Size Range | DN50-DN600 2″-24″(DN50- DN600) |
| Temperature Range | -40 ～ 60℃ |
| Contact Rating | 15 Amps at 125/250VAC |
2- Standard
Standard for Installation of Sprinkler System
One-And Two-Family Dwellings and Manufactured Homes Installation of Sprinkler Systems
Standard for The Installation of Sprinkler System in Low-Rise Residential
Occupancies National Fire Alarm Code
NFPA-13
NFPA-13D
NFPA-13R
NFPA-72
3- Features
- Double micro switch design
Double micro switch design reduces the risk of false signal delivery caused by tamper switch malfunction. Meanwhile, multi-signal transmission can meet different requirement of more customers.
- Adjustable screw design
With accurate adjustment supported by the adjustable screw, the two tamper switches
can be triggered synchronously. It is convenient to do micro-adjustment after installation on the OS&Y gate valve.
- IP Grade: IP65
Dust proof and water proof, good guarantee for the inner structure safety.
Design & Dimensions
Material Specifications
| Part No. | Part | Material |
| 1 | Cover | Die-Cast Aluminum |
| 2 | Tamper Switch Bracket | Carbon Steel Q235 |
| 3 | Tamper Switch | PA66+GF30 |
| 4 | Base | Die-Cast Aluminium |
| 5 | Clamp Plate | Carbon Steel Q235 |
| 6 | Trip Rod | SS304 |
| 7 | Axial Rod | Nylon |
| 8 | Gasket | CR Foam Cotton |
| 9 | Pressing Sleeve | EPDM |
| 10 | Fixing Bracket | Carbon Steel Q235 |
| Size | Dimensions(mm) | |||||
| Inch | mm | A | B | H | L | Dmax |
| 2-16” | 50-400 | 99 | 68 | 148 | 200 | 105 |
| 18-24” | 450-600 | 99 | 68 | 148 | 360 | 135 |
a) Installation
Step 1: Operate OS&Y gate valve to the fully open position, set the trip rod across the yoke as far as possible from the valve gland to make sure that it shall be sitting against the un-threaded part of the valve stem.
Step 2: Install the supervisory switch together with the carriage rod and fixing bracket. Step 3: Loosen the locking screw, adjust the length of the trip rod, make sure it sits at the right position where the trip rod should be exceeding the valve stem but not touching the mounting plate. Tighten the locking crew and fix the trip rod.
- Clamp Plate
- Carriage Rod
- Groove of Stem
- Trip Rod
- Fixing Bracket
| Note |
| In case the trip rod is too long, loosen the locking screw to remove the trip rod. Cut off the notched section (1 inch), and install the trip rod again by repeating step 3. If there’s a pre-machined groove on the stem to mounting the supervisory switch, proceed with step 6 directly. If there is no pre- machined groove on the stem, proceed with step 4 and 5. |
Step 4: Mark the valve stem at the center of the trip rod.
Step 5: Remove the supervisory device and then file a 1/8″deep groove centered on the mark on the valve stem with a 3/8″diameter straight file. Round and smooth the edges of the groove to prevent damage to the valve packing and to make sure that the trip rod can move easily in and out of the groove with the operation of the valve.
Install the supervisory switch with the trip rod centered in groove.
Step 6: Loosen 2 screws and slide the supervisory switch on the bracket. Adjustment is correct when switches are triggered with the trip rod seated in the valve stem groove and the switches are not triggered when the trip rod moves out of the groove.
Step 7: Tighten the screws and all mounting devices. Make sure that the trip rod moves in and out of the groove easily, and within one turn when the valve is operated from the fully open position towards to closing position the switches can be triggered.
| Warning |
| In case the trip rod is too long, loosen the locking screw to remove the trip rod. Cut off the notched section (1 inch), and install the trip rod again by repeating step 3. If there’s a pre-machined groove on the stem to mounting the supervisory switch, proceed with step 6 directly. If there is no pre- machined groove on the stem, proceed with step 4 and 5. |
b) Wiring Instructions
Use a special key to disassemble the tamper proof screws.
Wire across the electric outlet and connect with the terminals of the supervisory switch.
Connect with the appropriate terminal.
Typical Electrical Connections :
Typical Switch Action :
Trouble Shooting
- False signal: take off the cover, adjust the trigger screw, then fix it with dry
- Tamper switch damage: Contact the sales agent for replacement of
- Use a special key to disassemble the tamper proof
- Wire across the electric outlet and connect with the terminals of the supervisory
- Connect with the appropriate terminal. COM. COM. N.O. N.C. N.C. N.O. Local Circuit Power for Indicating Device Supervisory Circuit of Control Panel Indicating Device End of Line Resistor
Transportation and Storage
- During transportation, take care to prevent violent vibration, throwing, collision, etc., and with proper protection from rain or chemical
- When receiving the supervisory switch, check and confirm if there’s damage during transportation, and put them on the ground carefully.
- The supervisory switch should be stored in a clean, dry, well-ventilated place with non-corrosive
Trouble Shooting
- False signal: take off the cover, adjust the trigger screw, then fix it with dry
- Tamper switch damage: Contact the sales agent for replacement of
Maintenance & Service
- Check on the signal effectiveness regularly, make sure that there is no mis-location of the device which shall result in false signal or signal
- Inspect the wire connection regularly to avoid loosening of
