The FL Series regulators are accurate pilot-operated, pressure balanced, soft seated regulators designed for high pressure transmission/city gate, large capacity distribution systems and power plant feeds. The FL Series provides smooth, quiet operation, tight shutoff and long life. The regulator utilizes a main valve actuator, a Type PRX pressure reducing pilot, and a Type SA/2 pilot supply pressure regulator. The Type PRX pilot uses inlet pressure reduced by a Type SA/2 supply pressure regulator, as loading pressure to operate the main valve actuator. The outlet pressure is sensed through a control line on the main valve actuator and also on the Type PRX pilot diaphragm.

• Features
• Body Sizes
• Main Valve End Connection Style and Pressure Ratings
• Maximum Inlet and Outlet (Casing) Pressure
• Minimum Operating Differential Pressure
• Pressure Registration
• Maximum Temperature Capabilities
• Approximate Weights
• Additional Technical Data

Features

• High capacity
• Versatility
• Counterbalanced shutter
• Full strength diaphragm
• Easy startup
• No atmospheric bleed
• Tight shutoff
• Quiet operation
• Modularity design

Body Sizes

Type FL: NPS, 1, 2, 3, 4, 6 and 8 (DN 25, 50, 80, 100, 150 and 200)

Type FL with Type SRS Silencer (Inlet x Outlet): NPS 1x4, 2x6, 3x10, 4x10, and 6x12 (DN 25x100, 50x150, 80x250, 100x250, and 150x300)

Main Valve End Connection Style and Pressure Ratings

ASME CL300 RF: 740 psig (51,0) bar⁽⁴⁾

ASME CL600 RF: 1450 psig (100) bar⁽⁴⁾

⁽⁴⁾At average ambient temperature

Maximum Inlet and Outlet (Casing) Pressure

1450 psig (100 bar)⁽⁴⁾

⁽⁴⁾At average ambient temperature 

Minimum Operating Differential Pressure

7.3 psid (0,50 bar d)⁽²⁾

⁽²⁾7.3 psid (0,50 bar d)

Pressure Registration

Maximum Temperature Capabilities

-4º to 140ºF (-20º to 60ºC)⁽³⁾

⁽³⁾Types PRX and SA/2 fluorocarbon elastomer are limited to 0ºF (-18ºC)

Approximate Weights

1-inch (DN 25): 68 lbs (31 kg)

1 1/2-inch (DN 40): 103 lbs (47 kg)

2-inch (DN 50): 132 lbs (60 kg)

2 1/2-inch (DN 65): 194 lbs (88 kg)

3-inch (DN 80): 326 lbs (148 kg)

4-inch (DN 100): 443 lbs (201 kg)

6-inch (DN 150): 1058 (480 kg)

8-inch (DN 200): 1460 (662 kg)

Additional Technical Data