W.C. Branham - Pneumatic Spring Applied Brakes

W.C. Branham Inc. has a wide breadth of pneumatic spring applied brakes. They include the PFS47, PFS200, PFS200UL, and PFS400 series' as well as the recently introduced PFS520 and PFS522 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 PFS520 has 3.3 times and the PFS522 has 6.6 times the brake holding torque of the PFS400.

The PFS200SUL allows for use with an unlimited brake disc diameter range. Same torque specifications as PFS200. Available as fix mounted version too.

Active minimum air pressure of 85 psi releases the brake piston (pulls the brake piston away) from the brake disc rotor and stores that energy in a Belleville disc spring stack (100 psi release rated for PFS400).

Then, at loss of that air pressure the energy stored in the disc spring stack is emitted driving the brake piston and engaging the disc rotor for positive stopping.

Specifications

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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

PFS200SUL 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 | 2065 lb. clamping force | 8.19 sq. in. total friction pad area | Unlimited disc diameter

PFS200EP Extended Pad Series

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 | 2065 lb. clamping force | 23.89 sq. in. total friction pad area | 7.72 cu. in. of wearable material | From 12 inch to 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 | Unlimited disc diameter

PFS400EP Extended Pad 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 | 23.89 sq. in. total friction pad area | 7.72 cu. in. of wearable material | From 12 inch to unlimited disc diameter

PFS520 Series

Dual Belleville Disc Spring Stacks | 6,118 lb. Tangential Force at zero friction pad wear |110,325 in. lbs. F. using 40 inch disc diameter at maximum tangential force | 13,596 lb. clamping force | 47.0 sq. in. total friction pad area | Brake disc diameter starting at 20 inches up to unlimited diameter

PFS522 Series

Dual Belleville Disc Spring Stacks | 12,236 lb. Tangential Force at zero friction pad wear | 220,651 in. lbs. F. using 40 inch disc diameter at maximum tangential force | 27,192 lb. clamping force | 47.0 sq. in. total friction pad area | Brake disc diameter starting at 20 inches up to unlimited diameter

Special Note.

Friction pad wear effects braking torque. Therefore, PFS series caliper brakes should not be used for tensioning or high cyclic stop applications.

Choose from: All, PFS47, PFS200 <16" Disc Dia., PFS200SUL Unlimited Disc Dia., PFS200EP, PFS200DUL Unlimited Disc Dia., PFS400, PFS400EP, PFS520 or PFS522 Series

Products Available

Product #	Name	Description	Additional Info	Disc Thick. (in.)	Fluid Type
4004-0222	PFS47AF	Single Acting, Floating Mount. Use Fixed Disc	Single Piston. Spring Applied 85 PSI Rel.	5/32	Air
4004-0225	PFS47BF	Single Acting, Floating Mount. Use Fixed Disc	Single Piston. Spring Applied 85 PSI Rel.	1/4	Air
4004-0226	PFS47LF	Single Acting, Floating Mount. Use Fixed Disc	Single Piston. Spring Applied 85 PSI Rel.	3/8	Air
4004-0227	PFS47EF	Single Acting, Floating Mount. Use Fixed Disc	Single Piston. Spring Applied 85 PSI Rel.	1/2	Air
4004-0231	PFS200AF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	5/32	Air
4004-0232	PFS200BF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1/4	Air
4004-0233	PFS200LF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	3/8	Air
4004-0234	PFS200EF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1/2	Air
4004-0256	PFS47TF	Single Acting, Floating Mount. Use Fixed Disc	Single Piston. Spring Applied 85 PSI Rel.	3/4	Air
4004-0265	PFS200TF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	3/4	Air
4004-0771	PFS400AF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	5/32	Air
4004-0772	PFS400BF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1/4	Air
4004-0773	PFS400LF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	3/8	Air
4004-0774	PFS400EF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1/2	Air
4004-0775	PFS400HF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	5/8	Air
4004-0776	PFS400TF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	3/4	Air
4004-0777	PFS400OF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1.0	Air
4004-0778	PFS400QF	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1 1/8	Air
4005-0030	PFS200SAUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	5/32	Air
4005-0031	PFS200SBUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1/4	Air
4005-0032	PFS200SLUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	3/8	Air
4005-0033	PFS200SEUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1/2	Air
4005-0034	PFS200SJUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	5/8	Air
4005-0035	PFS200STUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	3/4	Air
4005-0036	PFS200SOUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1.0	Air
4005-0037	PFS200SQUL	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1-1/8	Air
4005-0038	PFS200DAUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	5/32	Air
4005-0039	PFS200DBUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	1/4	Air
4005-0040	PFS200DLUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	3/8	Air
4005-0041	PFS200DEUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	1/2	Air
4005-0042	PFS200DJUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	5/8	Air
4005-0043	PFS200DTUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	3/4	Air
4005-0044	PFS200DOUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	1.0	Air
4005-0045	PFS200DQUL	Double Acting, Fixed Mount. Use Fixed or Floating Disc	Quad Pistons. Spring Applied 85 PSI Release Pressure	1-1/8	Air
4005-0125	PFS400IF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	3/16	Air
4005-0126	PFS400BF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1/4	Air
4005-0127	PFS400LF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	3/8	Air
4005-0128	PFS400EF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1/2	Air
4005-0129	PFS400JF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	5/8	Air
4005-0130	PFS400TF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	3/4	Air
4005-0131	PFS400OF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1.0	Air
4005-0132	PFS400QF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 100 PSI Rel.	1-1/8	Air
4005-0139	PFS200AF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	5/32	Air
4005-0140	PFS200IF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	3/16	Air
4005-0141	PFS200BF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1/4	Air
4005-0142	PFS200LF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	3/8	Air
4005-0143	PFS200EF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1/2	Air
4005-0144	PFS200JF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	5/8	Air
4005-0145	PFS200TF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	3/4	Air
4005-0146	PFS200OF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1.0	Air
4005-0147	PFS200QF-EP	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1-1/8	Air
4252-0060	PFS520SE	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 90 PSI Rel.	1/2	Air
4252-0061	PFS520SJ	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 90 PSI Rel.	5/8	Air
4252-0062	PFS520ST	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 90 PSI Rel.	3/4	Air
4252-0063	PFS520SO	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 90 PSI Rel.	1.0	Air
4252-0064	PFS520SQ	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 90 PSI Rel.	1-1/8	Air
4252-0070	PFS522SE	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1/2	Air
4252-0071	PFS522SJ	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	5/8	Air
4252-0072	PFS522ST	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	3/4	Air
4252-0073	PFS522SO	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1.0	Air
4252-0074	PFS522SQ	Single Acting, Floating Mount. Use Fixed Disc	Dual Pistons. Spring Applied 85 PSI Rel.	1-1/8	Air