Manual, Motorized, & Electropneumatic Butterfly Valves, ISO-KF Interface

Key High's QBV "KF" line of butterfly valves are offered in four sizes, NW 16 (3/4") through NW 50 (2"). Industry-standard ISO-KF interface dimensions allow convenient system assembly, as no tools are required. The ISO-KF interface offers infinite rotational valve positioning, providing excellent flexibility.

QBV ISO-KF butterfly valves require only ¼ turn from the closed position to open fully. The small physical footprint of the valve saves valuable space, and the short flow path results in high conductance. These valves are offered with 6061-T6 body construction and 304 stainless steel body construction. QBV ISO-KF butterfly valves make an ideal choice for many applications, such as gauge isolation and roughing lines

Key Speedy Manual Butterfly Valves; ISO-KF Interface

PART NUMBER	MATERIAL	A	B	C	D	FLANGE SIZE
QBV-75-AL-16	Aluminum	.65	2.75	2.250	2.33	NW 16
QBV-75-SS-16	Stainless Steel	.65	2.75	2.250	2.33	NW 16
QBV-100-AL-25	Aluminum	.86	2.75	1.85	2.33	NW 25
QBV-100-SS-25	Stainless Steel	.86	2.75	1.85	2.33	NW 25
QBV-150-AL-40	Aluminum	1.27	2.75	1.85	2.33	NW 40
QBV-150-SS-40	Stainless Steel	1.27	2.75	1.85	2.33	NW 40
QBV-200-AL-50	Aluminum	1.46	2.95	2.05	2.42	NW 50
QBV-200-SS-50	Stainless Steel	1.46	2.95	2.05	2.42	NW 50

Options: Key Speedy Manual Butterfly Valves; ISO-KF Interface

Add option code to suffix of part number.

DESCRIPTION	OPTION CODE
Locking Handle for Exhaust Damper Applications	-HH

Key Speedy Motorized Butterfly Valves; ISO-KF Interface

PART NUMBER	MATERIAL	A	B	C	D	E	FLANGE SIZE
QBV-75-M-AL-16	Aluminum	.65	2.75	2.250	8.00	4.50	NW 16
QBV-75-M-SS-16	Stainless Steel	.65	2.75	2.250	8.00	4.50	NW 16
QBV-100-M-AL-25	Aluminum	.86	2.75	1.85	8.00	4.50	NW 25
QBV-100-M-SS-25	Stainless Steel	.86	2.75	1.85	8.00	4.50	NW 25
QBV-150-M-AL-40	Aluminum	1.27	2.75	1.85	8.00	4.50	NW 40
QBV-150-M-SS-40	Stainless Steel	1.27	2.75	1.85	8.00	4.50	NW 40
QBV-200-M-AL-50	Aluminum	1.46	2.95	2.05	8.12	4.50	NW 50
QBV-200-M-SS-50	Stainless Steel	1.46	2.95	2.05	8.12	4.50	NW 50

Standard actuators are 120/60 AC, cycle time 3.5 seconds per 90°, duty cycle is 25%, NEMA 4 enclosure

Options: Key Speedy Motorized Butterfly Valves; ISO-KF Interface

Add option code to suffix of part number.

DESCRIPTION	OPTION CODE
12 Volt DC Solenoid	-12VDC
24 Volt DC Solenoid	-24VDC
Two Additional Switches for Use As Limit Switches	-LS
Potentiometer: For measuring resistance output for feedback of actual position. Potentiometers offered in 0-135 ohm, 0-1000 ohm, and 0-5000 ohm, must be specified at time of order	-P

Key Speedy Electropneumatic Butterfly Valves; ISO-KF Interface

PART NUMBER	MATERIAL	A	B	C	D	E	FLANGE SIZE
QBV-75-P-AL-16	Aluminum	.65	2.75	2.250	4.37	6.87	NW 16
QBV-75-P-SS-16	Stainless Steel	.65	2.75	2.250	4.37	6.87	NW 16
QBV-100-P-AL-25	Aluminum	.86	2.75	1.85	4.37	6.87	NW 25
QBV-100-P-SS-25	Stainless Steel	.86	2.75	1.85	4.37	6.87	NW 25
QBV-150-P-AL-40	Aluminum	1.27	2.75	1.85	4.37	6.87	NW 40
QBV-150-P-SS-40	Stainless Steel	1.27	2.75	1.85	4.37	6.87	NW 40
QBV-200-P-AL-50	Aluminum	1.46	2.95	2.05	4.50	6.87	NW 50
QBV-200-P-SS-50	Stainless Steel	1.46	2.95	2.05	4.50	6.87	NW 50

All pneumatic valves feature double acting air cylinders, 120/60 air solenoid and require a 60 to 100 psig compressed air supply. All pneumatic valves are normally closed and in the event of an electrical failure will close and remain closed until power is restored.

Options: Key Speedy Electropneumatic Butterfly Valves; ISO-KF Interface

Add option code to suffix of part number.

DESCRIPTION	OPTION CODE
12 Volt DC Solenoid	-12VDC
24 Volt DC Solenoid	-24VDC
24 Volt AC Solenoid	-24VAC
230 Volt AC Solenoid	-230VAC
Magnetic reed switches for position indication. Reed switches feature an LED indicator for visual confirmation of valve position and have a two-meter cable. Switches are 110 to 120 VAC or 4.5 to 24VDC and must be specified at time of order.	-RS

General Options Available: Contact Factory

Kalrez®, Parafluro®, Chemraz®, or other suitable materials.
Roughing ports / Gauge ports consisting of KF, MET-SEAL, and VCR® flanges are available.

Product information is subject to change without notice. Product images may include options or accessories not included with the base model.

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For 50 years, Key High Vacuum Products, Inc. has been a trusted leader in precision-engineered stainless steel high vacuum weldments. With tens of thousands of unique weldments in use—from particle accelerators to industrial leak detectors—our expertise is proven across industries. Rooted in innovation, craftsmanship, and an unwavering commitment to customer satisfaction, we deliver high-quality, customized solutions that drive success. Every day, our team brings a unique blend of passion and precision, ensuring your goals are met with excellence—because your mission matters. Experience the Key High difference.

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