Watts DBF-04 - Manual

Watts Series DBF resilient seated butterfly valves are available in
sizes 2"-12" (50-300mm), wafer or lug body design. This series
was designed to meet the stringent requirements for HVAC,
Irrigation, OEM, Commercial and Institutional applications, and
wherever positive shutoff is required for liquids, gases, and slur-
ries. Incorporating a 200psi (13.8 bar) pressure rating for 2"-12"
(50-300mm), the Series DBF is standardly constructed of a
ductile iron body, an aluminum bronze, ductile iron or 316SS
disc, and a 416SS or 316SS shaft. Standard seat materials
available include Buna-N, EPDM, and Viton ® . A phenolic-backed
seat prevents the seat from collapsing or dislodging. In addition
to the above features, the Series DBF mounting pad is designed
to ISO 5211 standard to accommodate lever handles, gear
operators or actuator.
The Watts Series DBF butterfly valves are designed and manu-
factured for use with ANSI 125 or 150 Class flanges and to
comply with API 609 and MSS-SP-67.
Features
Operators – Ten-position handle is standard. An infinite
positioning/locking handle is also available on valve sizes 2 " -12 "
(50-300mm). The infinite position Pos-Lok throttle plate incorpo-
rates a memory stop and a padlocking device in the fully closed
position. Manual, worm-gear operators are available for all valves
and are recommended on 8 " (200mm) and larger sizes. Watts
butterfly valves are also available with electric or pneumatic
actuators and chain wheel operators to satisfy a wide variety
of requirements.
Shaft
– One-piece shaft delivers positive disc-to-seat location
with maximum strength. 416SS is standard with aluminum
bronze and ductile iron discs and 316SS shaft with stainless
steel disc.
Shaft Bushings – Duralon
® bushings (3) provide shaft support
for proper shaft alignment and minimal shaft deflection.
Shaft Seal
– To prevent shaft leakage, the bidirectional shaft
seal prevents external contamination of stem area and provides
a backup seal to the primary shaft seal formed by the disc/seat
interface.
Body
– Watts Butterfly Valves are available in Full Lug (DBF-03)
and Wafer (DBF-04) types designed for use between ANSI 125
and 150 flanges. Face-to-face dimensions comply with API 609
and MSS-SP-67. All valves are designed to accommodate 2 "
of insulation. The standard body material is ASTM A-536
ductile iron .
Wafer
Full Lug
Butterfly Valves
Series DBF-03 Full Lug and DBF-04 Wafer
Sizes: 2" - 12" (50-300mm) 200psi (13.8 bar)
For HVAC, Irrigation, OEM, Commercial and Institutional Applications
ES-DBF
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
Disc – Disc edge is machined and polished 360° to assure leak-
tight shutoff while minimizing operating torque. Positive, disc-to-
shaft connection is provided by stainless steel precision taper
pins that are vibration proof.
Seat – Phenolic-backed, non-collapsible, resilient seat is me-
chanically secured to provide dead-end service to the full 200psi
(13.8 bar) pressure rating. Seat face eliminates the need for
flange gaskets. Full 360° sealing isolates the body components
from the media and provides the primary shaft seal. Available in
EPDM, Buna-N, and Viton ® .
Duralon ® is a Registered Trademark of Rexnord Corporation
Teflon ® is a Registered Trademark of E.I. DuPont de Nemours, Co., Inc.
Viton ® is a registered trademark of DuPont Dow Elastomers.
LEAD FREE
*
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.