Pneumatic Spring Applied Wind Turbine Brakes

The popular PFS200 series.

W.C. Branham brings spring applied caliper disc brakes from the factory floor to towering wind turbines.

Wind Turbine Friendly.

As part of over-speed protection, spring applied brakes have the ability to stop the wind turbine rotor in harsh conditions.

Pneumatic (PFS)

Pneumatic Spring Applied Brakes include the PFS47, PFS200, PFS200UL and PFS400 series'. The PFS400 has 2 times the brake holding torque than that of the PFS200 series and 4 times than that of the PFS47. The new PFS400 series is just the latest product designed to meet the needs of our customers.

How do they work?

Active minimum pressure releases the brake piston (pulls the brake piston away) from the brake disc rotor and stores that energy in a Belleville disc spring stack. At pressure loss, the energy stored in the disc spring stack is emitted driving the brake piston and engaging the disc rotor for positive stopping.

Common Features.

• Cast aluminum construction | Hardcoated housings | Non-asbestos friction material | Replaceable friction pads | Buna-N seals | Viton® seals optional | Float mount | Belleville disc spring stack
• Standard models for brake disc thicknesses of 5/32, 1/4, 3/8, 1/2, 3/4 inches and other sizes.
• We welcome custom brake disc thicknesses including metric.

Specifications

(click for more details)

PFS47 Series

• Single Belleville Disc Spring Stack | 465 lb. Tangential Force at zero friction pad wear | 6570 in. lbs. F. using 30 inch disc diameter at maximum tangential force | 4.10 sq. in. total friction pad area | 1033 lb. clamping force | Unlimited disc diameter

PFS200 Series

• Dual Belleville Disc Spring Stacks | 929 lb. Tangential Force at zero friction pad wear | 6626 in. lbs. F. using 16 inch disc diameter at maximum tangential force | 8.19 sq. in. total friction pad area | Up to 16 inch disc diameter

PFS200UL Unlimited Disc Series - Choose From Single or Double Acting Models

• Dual Belleville Disc Spring Stacks | 929 lb. Tangential Force at zero friction pad wear | 13,129 in. lbs. F. using 30 inch disc diameter at maximum tangential force | 8.19 sq. in. total friction pad area | Unlimited disc diameter

PFS400 Series

• Dual Belleville Disc Spring Stacks | 1859 lb. Tangential Force at zero friction pad wear | 35,568 in. lbs. F. using 40 inch disc diameter at maximum tangential force | 4130 lb. clamping force | 8.19 sq. in. total friction pad area

Engineering note: Spring applied brakes are intended for use as an emergency stop or static holding device. It is not suggested to use in continuous slip applications as torque capacity is directly related to friction pad wear.

Choose from: All, PFS47, PFS200 <16" Disc Dia., PFS200SUL Unlimited Disc Dia., PFS200DUL Unlimited Disc Dia. or PFS400 Series

Products Available

	Product #	Name	Description	Additional Info	Disc Thick.(in.)	Fluid Type
	4004-0222W	PFS47AF	Single Acting, Floating Mount. Use Fixed Disc	Single Piston. Spring Applied 85 PSI Rel.	5/32	Air
	4004-0225W	PFS47BF	Single Acting, Floating Mount. Use Fixed Disc	Single Piston. Spring Applied 85 PSI Rel.	1/4	Air
	4004-0226W	PFS47LF	Single Acting, Floating Mount. Use Fixed Disc	Single Piston. Spring Applied 85 PSI Rel.	3/8	Air
	4004-0227W	PFS47EF	Single Acting, Floating Mount. Use Fixed Disc	Single Piston. Spring Applied 85 PSI Rel.	1/2	Air
	4004-0231W	PFS200AF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	5/32	Air
	4004-0232W	PFS200BF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	1/4	Air
	4004-0233W	PFS200LF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	3/8	Air
	4004-0234W	PFS200EF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	1/2	Air
	4004-0256W	PFS47TF	Single Acting, Floating Mount. Use Fixed Disc	Single Piston. Spring Applied 85 PSI Rel.	3/4	Air
	4004-0265W	PFS200TF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	3/4	Air
	4004-0771W	PFS400AF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	5/32	Air
	4004-0772W	PFS400BF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1/4	Air
	4004-0773W	PFS400LF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	3/8	Air
	4004-0774W	PFS400EF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1/2	Air
	4004-0775W	PFS400HF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	5/8	Air
	4004-0776W	PFS400TF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	3/4	Air
	4004-0777W	PFS400OF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1.0	Air
	4004-0778W	PFS400QF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1-1/8	Air
	4005-0030W	PFS200SAUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	5/32	Air
	4005-0031W	PFS200SBUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	1/4	Air
	4005-0032W	PFS200SLUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	3/8	Air
	4005-0033W	PFS200SEUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	1/2	Air
	4005-0034W	PFS200SJUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	5/8	Air
	4005-0035W	PFS200STUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	3/4	Air
	4005-0036W	PFS200SOUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	1.0	Air
	4005-0037W	PFS200SQUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel	1-1/8	Air
	4005-0038W	PFS200DAUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	5/32	Air
	4005-0039W	PFS200DBUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	1/4	Air
	4005-0040W	PFS200DLUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	3/8	Air
	4005-0041W	PFS200DEUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	1/2	Air
	4005-0042W	PFS200DJUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	5/8	Air
	4005-0043W	PFS200DTUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	3/4	Air
	4005-0044W	PFS200DOUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	1/0	Air
	4005-0045W	PFS200DQUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	1-1/8	Air