Resilient Seated, High Performance
Delta T, a brand of Max-Air Technology, is dedicated to the manufacturing and distribution of high-quality valve products to the flow control industry. Delta T is focused on quarter turn butterfly valve solutions, from standard resilient butterfly valves, high performance valves (double and triple offset), control butterfly valves, as well as manual gearing, declutchable gearing, stem extensions, and chain & handwheel options. We also are well versed in tee and wye assemblies with linkage.
Specialty Butterfly Valves
Need information on how to get our products? Send us an inquiry!
050/051, 650/651 Series
Resilient Seated
- Iron Body Butterfly Valve; sizes 1-1/2” – 48”
- Stainless Steel Body Butterfly Valve; sizes 2” – 24”
- Wafer and Lugged Body Styles Available
- Manual Valves with handle or gear operator available
- ISO 5211 mounting patterns for ease of actuation
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ABS Type Approval, Certificate Pending
- Coast Guard, NSF – Approvals
800 Series | Double Offset
High Performance
(Series 850, 851, 852, 853, 860, 861, 862, 863, 871)
- ANSI 150, 300, & 600 in all styles
- Wafer, Lugged, & Flanged styles
- WCB & CF8M bodies stocked
(A broad selection of other materials available) - Blow out proof stem design
- Stainless Steel disc & stem standard on stocked trims
- TFM 1600 seats are standard, other soft seats are available
- Fire Safe & Metal seated versions are available
- ISO 5211 mounting is standard. (Direct mount for 12” & smaller, w/ included bracket on larger size)
- Class VI / bubble tight bi-directional sealing on all soft seated trims
- Dead End service to full pressure rating in preferred direction
- Control trim w/ anti-noise & anti-cavitation features available
900 Series | Triple Offset
(Series 950, 951, 952, 953, 954, 960, 961, 962, 963, 964, 970, 971, 972, 973, 974)
- ANSI 150, 300, & 600 in all styles
- Wafer, Lugged, & Flanged styles
- A broad selection of materials available
- Blow Out Proof stem design
- Stainless Steel disc & stem standard on stocked trims
- Standard replaceable body & disc seat
- Laminated & solid seats designed to meet application requirements
- Class VI / Bubble Tight sealing in preferred direction
- Dead End Service to full pressure rating in preferred direction
- Replaceable body disc
Specialty Butterfly Valves
API 609, NSF/ANSI 372, NSF/ANSI 61 (Commercial Hot), ABS Type Approval, USCG Category B
BKKE/BKKB Series
Resilient Seated
Marine Service
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050 Wafer Aluminum Bronze Body sizes 2” – 24”
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051 Lug Aluminum Bronze Body sizes 2” – 24”
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Rated pressure of 200 PSI in either direction
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Lug-style dead end service capabilities through 12” 200 PSI Unidirectional
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Install between Standard ANSI class 125/150 flanges
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ISO 5211 square drive shaft for easy automation
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Conforms to MSS-SP-67, MSS-SP-25, API–609
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Blowout-proof Design
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Field repairable with stock repair kits
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Vacuum service capable 2” thru 12” to 10 microns
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304 SS Handles available
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Cast Iron & Stainless Steel Gear Operators available
CE, PED, CRN
250/251 Series
Resilient Seated
Data Center Service
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Industry Leading 3-Year Limited Warranty
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250 Series Wafer Ductile Iron Body sizes 2” – 24”
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251 Series Lug Ductile Iron Body sizes 2” – 24”
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Bi-Directional Shutoff 250 PSI
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Bi-Directional Dead End Service 250 PSI (Lug only)
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Install between Standard ANSI class 125/150 flanges
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250 Series Wafer also compatible with PN10/PN16 flanges
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ISO 5211 square drive shaft for optional automation
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Conforms to MSS-SP-67, MSS-SP-25, API 609
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Designed for blowout-proof service
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Permanent Integral Seat Design
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Vacuum service capable (Please consult factory)
T50/T51 Series | Class 150
Powder, Abrasive Service, Tilted Disc
- Bubble tight shutoff (soft seats)
- Patented self-cleaning seat design
- Patented protective bearing design
- Suitable for wet, dry, or abrasive media
- Control, on/off, or manual service
- 8”-28” sizes available
- Class 150 Lug/Wafer/Double Flanged
- ISO 5211 Automation Ready
- Reduced Downtime: 4x or More Service Life than other valves based on application
C Series | Double Offset
High Performance
Cavitation Control
(Series C50, C51, C52, C53, C60, C61, C62, C63)
- ANSI Class 150 and 300 in Wafer, Lugged, & Flanged body styles
- Available in a broad selection of materials
- WCB and CF8M bodies standard
- CF8M Stainless Steel disc and stem standard
- Soft, fire safe, & metal seats available
- Metal seats (high temperature, corrosive services, metallurgical-sensitive applications) w/ Class IV shutoff
- ISO 5211 actuator mounting is standard, direct mounting on 12 inch and smaller
- Control & anti-cavitation trim plate provides a high level of control and noise reduction within the first 30° of rotation
- Soft seated trims offer bi-directional class VI shutoff
- Clean, field repairable design
