Watts LFM115 THD B 10-75 LS 1 1/2 Lead-Free Pressure Reducing Valve, Ductile Iron, NPT

The Watts LFM115 THD B 10-75 LS 1 1/2 is a 1-1/2" lead-free globe-pattern pilot-operated pressure reducing control valve with NPT connections, with a pilot adjustable from 10 to 75 psi. It features a ductile iron body and a buna-n seat. Rated to 600 psi and up to 160°F. This model is certified lead-free for potable-water installations.

This 1 1/2 inch ACV is armed with ArmorTek®, a patented 3-part advanced epoxy coating system designed to limit both microbial induced (MIC) and exposed metal substrate corrosion. This pressure reducing control valve is designed to automatically reduce a fluctuating higher inlet pressure to a constant lower downstream pressure regardless of varying flow rates. The quick closing action of the valve limits the possibility of damaging high inlet pressure from passing through the valve to downstream piping. This Mustang valve style has a globe body pattern with threaded end connections, configured with inlet/outlet gauge ports, Buna elastomers, and limit switch. SentryPlus Alert® technology provides intelligent pressure monitoring and notifications using integrated sensors, and integrates with the Sensor Control Monitor to deliver maintenance alerts through BAS via RS-485 Modbus or the Nexa® platform over Wi-Fi.

Features

• Body construction with patented 3-part ArmorTek epoxy coating for advanced corrosion resistance
• Globe body pattern with threaded end connections
• Range 10-75 psi
• Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa platform by Wi-Fi connectivity
• Inlet/outlet gauge ports, gauge not included
• Includes limit switch

Common Questions

What pressure setpoint can this valve be adjusted to?

The pilot on this valve is spring-ranged for 10–75 psi, so your target setpoint must fall inside that band. Watts builds the 115/116 platform with several pilot springs (2-30, 10-75, 20-175, 20-200 and 30-300 psi); ordering a setpoint outside 10–75 psi means a different pilot, not a field adjustment.

What is the maximum working pressure?

This unit is built as THD (NPT Threaded) and is rated to 600 psi. Threaded and grooved bodies on this platform carry a higher working pressure than 150# flanged bodies, so do not assume a flanged datasheet applies here.

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 UL Listed and FM Approved for fire protection?

Yes — this model carries the UL listing and FM approval required for fire-protection service. Non-listed control valves cannot be substituted on a fire job even when the body and pilot are otherwise identical.

Specifications

• Type: Pressure Regulator
• Size: 1-1/2"
• Inlet Size: 1-1/2"
• Outlet Size: 1-1/2"
• Connection: NPT
• Body Material: Ductile Iron
• Seat / Seal Material: Buna-N
• Max Pressure (psi): 600
• Operation: Pilot-Operated Diaphragm
• Port Style: Full
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: LFM115 THD B 10-75 LS 1 1/2
• Temperature: up to 160°F
• Certifications: UL, FM
• Lead-Free: Yes
• Item Type: Valve
• Control Function: Pressure Reducing
• Valve Platform: Mustang (M-Series)
• Body Pattern: Globe
• Pilot Adjustment Range (psi): 10-75
• End Connection / Pressure Class: THD (NPT Threaded)
• Configured Options: Limit Switch;Strainer
• Coating: ArmorTek 3-Part Epoxy
• UL Listed / FM Approved: Yes