Watts MS115 3 Lead-Free Pressure Reducing Valve, Stainless, Flanged

The Watts MS115 3 is a 3" lead-free globe-pattern pilot-operated pressure reducing control valve with Flanged connections. It features a stainless body and a buna-n seat. Rated to 285 psi and up to 160°F. This model is certified lead-free for potable-water installations.

This 3 inch pressure reducing control valve is designed to automatically reduce a fluctuating higher inlet pressure to a constant lower outlet pressure regardless of changing flow rate or varying inlet pressure. It is a full port, single chamber valve that incorporates a one-piece disc and diaphragm assembly that opens and closes as commanded by the pilot control system. This valve features a globe pattern CF8M 316 stainless steel body with ANSI class 150# stainless steel flanges, Buna-N disc and diaphragm assembly, stainless steel trim, tubing, fittings, and pressure reducing control. The maximum operating pressure is 285 psi and operating maximum temperature is 160 degrees F.

Features

• Lead free stainless steel construction
• Globe pattern
• Class 150 ANSI flanged
• Stainless steel pressure reducing control

Common Questions

What is the maximum working pressure?

This unit is built as 150# Flanged and is rated to 285 psi. End connection sets the ceiling on this platform, and 150# and 300# bodies are not interchangeable — confirm the class matches your flange drilling before ordering.

What fluid temperature can the Buna-N trim handle?

This valve is built with Buna-N elastomers, good to about 160°F. Watts offers the same body with Buna-N (to 160°F), FKM/Viton (to 250°F) or EPDM (to 300°F) — pick the elastomer for your fluid temperature, not the body.

Is this valve certified lead-free for potable water?

Yes. The "LF" prefix denotes Watts lead-free construction, compliant with the weighted-average 0.25% lead requirement of the Safe Drinking Water Act (NSF/ANSI 372) for potable-water service.

Specifications

• Type: Pressure Regulator
• Size: 3"
• Inlet Size: 3"
• Outlet Size: 3"
• Connection: Flanged
• Body Material: Stainless
• Seat / Seal Material: Buna-N
• Pressure Class: Class 150
• Max Pressure (psi): 285
• Operation: Pilot-Operated Diaphragm
• Port Style: Full
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: MS115 3
• Temperature: up to 160°F
• Lead-Free: Yes
• Item Type: Valve
• Control Function: Pressure Reducing
• Valve Platform: Mustang Stainless (MS-Series)
• Body Pattern: Globe
• End Connection / Pressure Class: 150# Flanged
• Coating: Fusion-Bonded Epoxy