Butterfly Valve Wafer End Model 240W
The Century Model 240W is a wafer type butterfly valve characterized by its thin body profile, designed to be installed and centered between two standard pipe flanges using through-bolts. Its minimal face-to-face dimension makes it ideal for applications where space is limited. The valve provides bubble-tight shut-off and includes a supervisory switch to electrically monitor its OPEN/SHUT status.
Key Features: UL Listed, FM Approved, Compact Wafer Body, Built-in Supervisory Switch, Bubble-Tight Shut-Off.
Primary Use: Isolation and control in tight spaces, such as pump rooms, mechanical rooms, and connections to fire department standpipes.
Widely used across various sectors, including: High-Rise Buildings, Commercial Interiors, HVAC Systems, and Light Industrial Applications.
Information
Proper Storage:
If storage is required, keep the valve in a cool, dry environment with end protectors in place. Prior to installation, re-inspect the unit to verify its condition.
Inspect for Shipping Damage:
- Visually inspect the entire valve assembly for any cracks, dents, or other damage sustained during transit.
- Subsequently, operate the handwheel through one full cycle (open to close and back) to confirm the smooth mechanical action of the Shaft (Item 7) and Disc (Item 8).
Verify External Components:
- Confirm that all bolts and nuts on the Electrical Turbine Box (Item 16) and supervisory switch are secure and have not loosened during shipment.
Handling Notice:
- Handle with care at all times to protect the EPDM sealing surfaces on the Disc (Item 8).
- Lift only by the valve Body (Item 1).
- Never lift, carry, or support the valve by the handwheel or gear operator. Applying force to these components can damage the operator and compromise valve alignment.
Verify Valve Specifications:
Before installation, confirm the valve’s model (240W), size, and pressure rating match the requirements listed in the system engineering plans.
Prepare Mating Surfaces:
Thoroughly clean the valve faces and the mating pipe flanges. Ensure all surfaces are completely free of dirt, rust, debris, and any foreign materials that could compromise the integrity of the seal.
Select and Inspect Gaskets:
Use two new gaskets rated for the system’s maximum operating pressure and temperature. Visually inspect the gaskets to confirm they are free from defects. Do not use a damaged gasket.
Valve Installation:
- CRITICAL: Ensure the Disc (Item 8) is in the slightly open position (approx. 10°) before installation. This prevents the disc edge from being pinched or damaged by the pipe flanges during installation.
- Align the piping and carefully spread the flanges apart just enough to slip the wafer valve body between them.
- Insert the valve between the flanges, ensuring the alignment holes on the valve Body (Item 1) line up with the flange bolt holes.
- Insert all long through-bolts. Hand-tighten the nuts to hold the assembly in place.
- Tighten the nuts incrementally using a star or crisscross pattern to ensure uniform pressure on the gaskets and to avoid damaging the valve body.
WARNING: Wafer valves are NOT suitable for dead-end service. The downstream piping cannot be removed while the line is under pressure, as the valve is held in place by the compression of the entire flange-to-flange assembly.
System Flushing:
After completing the installation and before pressurizing the system, thoroughly flush the interior of the valve and piping to remove all installation debris.
WARNING: All electrical wiring must be performed by a qualified electrician in accordance with all applicable local and national electrical codes. Disconnect power source before wiring to prevent electrical shock.
Contact Rating: 5A 250VAC
Operation:
- Opening: Rotate the handwheel counterclockwise until it stops. It is recommended to then turn the handwheel clockwise approximately one-half turn to prevent thermal binding.
- Closing: Rotate the handwheel clockwise until it reaches a firm mechanical stop.
Safety Notices:
- Prohibited Practices: Never use “cheater bars” or other leverage devices on the handwheel.
- On/Off Service Only: Do not use this valve for throttling.
Century Butterfly Valve Maintenance:
Century butterfly valves require no regular lubrication or internal maintenance. However, an annual inspection is required to ensure proper operation.
Pre-Maintenance Safety:
Before any inspection, ensure the line is fully depressurized.
Annual Inspection:
- Visually check for any signs of leakage at the flange connections and at the Body (Item 1)-to-operator connection.
- Operate the valve through one full OPEN/SHUT cycle to verify smooth operation.
System Pressure Testing:
When pressure testing the piping system, ensure the valve Disc (Item 8) is in the FULLY OPEN position to equalize pressure and prevent damage.
By following these maintenance steps, the Century butterfly valve will remain in proper working condition and ready to provide long and reliable service.
Please contact us at sales@centuryvalves.com for all your valves and hydrant needs.
| Model 240 W | ||
|---|---|---|
| Butterfly Valve Wafer End | ||
| Connections | Wafer | |
| Sizes | 2″, 2 1/2″, 3″, 4″, 6″, 8″, 10″, 12″ | |
| Approvals | UL 1091, FM1112 | |
| Design Standard | MSS-SP-67 | API 609 |
| Coating | Fusion Bond Epoxy interior and exterior to suit AWWA C550 Standard | |
| Pressure Rating | 2″ ~ 12″ @ 300psi | |
| Temperature | -10°C to 120°C | 14°F to 248°F |
Certifications
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