Udor BK Series Pumps

11-1/2″L x 8-1/2″ W x 5″ H
Heavy Duty Bronze or High Strength Aluminum Alloy Connecting Rod Assemblies 1 Lb. Each
Heavy Duty Reinforced Brass Heads with External and Internal Bracing
Large Diameter Stainless Steel Valve Caps with Increased Thread Depth

1/2″ Inlet 3/8″ Outlet
Reinforcing Ring on Inlet and Discharge Ports
Deeper Back Covers For Increased Oil Capacity.
15.4 oz. Crank Case Capacity

Solid Shaft Models

24 mm Keyed, Solid Shaft

	Model	Gpm	Psi	Power Requirements	Seal Kit	Valve Kit	Weight	Price
1450 RPM	BKC 13/30 S	3.4	4350	10 HP Electric	UD109 CALL	UD30 $92.65	23 lbs.	$646.92
	BKC 15/30 S	4.0	4000	10 HP Electric	UD28 $99.98	UD30 $92.65	23 lbs.	$646.92
	BKC 18/25 S	5.0	3500	12.5 HP Electric	UD9 $110.57	UD30 $92.65	23 lbs.	$668.52
	BKC 21/25 S	5.5	3500	15 HP Electric	UD9 $110.57	UD30 $92.65	23 lbs.	$754.92
1750 RPM
	BKD 4.0/44 S	4.0	4000	10 HP Electric	UD28 $99.98	UD30 $92.65	23 lbs.	$646.92
	BKD 4.0/44 SL*	4.0	4000	10 HP Electric	UD28 $99.98	UD30 $92.65	23 lbs.	$646.92
	BKD 5.0/36 S	5.0	3500	12.5 HP Electric	UD28 $99.98	UD30 $92.65	23 lbs.	$664.20
	BKD 5.0/36 SL*	5.0	3500	12.5 HP Electric	UD28 $99.98	UD30 $92.65	23 lbs.	$664.20
Rail Kit	8702.10	Standard ( 7/8″ ) Rail Kit for MK-Series Solid Shaft Pumps – $31.32
Rail Kit	8702.20	Tall ( 2-1/2″ ) Rail Kit for MK-Series Solid Shaft Pumps – CALL

Direct Drive, Gas Engine Flange Models

1″ Hollow Shaft, SAE J609-B Mounting Flange and Set Screw

	Model	Gpm	Psi	Power Requirements	Seal Kit	Valve Kit	Weight	Price
3400 RPM	BKL 4.0/44 W	4.0	4350	14.5 HP Gas	UD109 CALL	UD30 $92.65	26 lbs.	$653.40
	BKL 5.0/36 W	5.0	3625	16 HP Gas	UD109 CALL	UD30 $92.65	26 lbs.	$653.40

Gear Reduction Drive, Gas Engine Models

1″ Hollow Shaft, SAE J609-B Flange – 2.2:1 Gear Reduction

	Model	Gpm	Psi	Power Requirements	Seal Kit	Valve Kit	Weight	Price
Gear Reduction	BKC 13/30 GR1	3.4	4350	14.5 HP Gas	UD109 CALL	UD30 $92.65	30 lbs.	$860.76
	BKC 15/30 GR1	4.0	4350	16 HP Gas	UD28 $99.98	UD30 $92.65	30 lbs.	$860.76
	BKC 18/25 GR1	4.9	3625	16 HP Gas	UD28 $99.98	UD30 $92.65	30 lbs.	$884.52
	BKC 21/25-GR1	5.5	3625	18 HP Gas	UD28 $99.98	UD30 $92.65	30 lbs.	CALL

Gear Reduction Drive, Gas Engine Models

1-1/8″ Hollow Shaft, SAE J609-B Flange – 2.2:1 Gear Reduction

	Model	Gpm	Psi	Power Requirements	Seal Kit	Valve Kit	Weight	Price
Gear Reduction	BKC 13/30 GR1-1/8	3.4	4350	14.5 HP Gas	UD109 CALL	UD30 $92.65	30 lbs.	$879.12
	BKC 15/30 GR1-1/8	4.0	4350	16 HP Gas	UD28 $99.98	UD30 $92.65	30 lbs.	$879.12
	BKC 18/25 GR1-1/8	4.9	3625	16 HP Gas	UD28 $99.98	UD30 $92.65	30 lbs.	$898.56
	BKC 21/25-GR1-1/8	5.5	3625	18 HP Gas	UD28 $99.98	UD30 $92.65	30 lbs.	CALL

*”L” denotes left hand shaft

Free Ground Shipping

Towards orders $150.00 or more!
For exclusions click below

Shipping Policy

Returns & Refunds

Most items may be returned for credit or exchanged within 30 days. For more information, click below

Refund Policy

Top Notch Support

For order or technical assistance, contact EnviroSpec

Contact Us

751 Martin Luther King Dr. Homerville, GA 31634

office@envirospec.com

Newsletter Sign Up

Sign Up & Receive Exclusive Offers & Technical Wisdom For The Professional Power Wash Contractor!

© Copyright 2025 EnviroSpec. All Rights Reserved

Site by Diana Nichols and company