F5 Sandwich Regulators
V-437BP
Conversion Procedures
Remove pressure and electrical connections and perform conversion per
instructions below. Tighten all fasteners per Table 3. Liberally grease all seals.
• Loosen three body to base mounting bolts (item 1) using a 2 mm hex wrench
and lift valve body from sandwich.
• Thoroughly clean valve body, regulator, and base mounting surfaces of all
foreign material.
• Perform conversion procedures per instructions below.
• Assure the proper location of the plug located at 12 in either the 12 end or
bottom surface per Table 2. Also assure the location of plugs in holes marked
SP or DP at the 14 and 12 ends as well as the top and bottom surfaces.
• Assure gaskets (items 2 & 4) are installed on valve and regulator mounting
surfaces and flats on studs (item 3) are still parallel to base edge.
• Install the regulator over the studs, engaging the electrical plug carefully
during this process.
• Certain conversions (notably from internal to external pilot supply or vice
versa, or from or to Air Pilot Operated valves) require the pilot supply plugs in
the valve sandwich to be moved. Always verify the proper plug locations in
the valve sandwich prior to reassembly per Table 1. If necessary to relocate
plugs simply remove by prying up with a narrow tool. Assure the o-ring is not
nicked or torn, and that it has a coating of grease. Install o-ring end first into
the appropriate hole.
• Replace the valve on the regulator, engaging the electrical plug carefully
during this process.
• Tighten the 3 main body mounting screws (item 1) using a 3 mm hex wrench
from 2.5 to 2.9 N•m (22 to 26 in.-lbs).
• Apply main pressure and check for leaks. If any are present, do not operate
the valve - repeat the reassembly process until satisfactory.
• Assure gasket (item 27) remains in regulator block track.
Common Port to Independent Port
12 End of Regulator Block
• Remove & discard stamped plate (item 5) and screws (item 6).
• Remove & retain plug (item 7) from area marked SP.
• Install regulator body assembly (item 8).
• Install o-ring (item 9), piston o-ring (item 10), lipseal (item 11), piston
(item 12), spring (item 13), & bonnet assembly (item 14) using new screws
(item 15) from kit.
14 End of Regulator Block
• Remove bonnet assembly (item 14), lipseal (item 11), piston (item 12), &
spring (item 13) by removing screws (item 15).
• Remove regulator body assembly (item 8).
• Move plug (item 7) from SP to DP.
• Reinstall regulator body assembly (item 8).
• Reinstall lipseal (item 11), piston (item 12), spring (item 13), & bonnet
assembly (item 14) using existing screws (item 15).
Top Surface of Regulator Block
• Install plug (item 7) removed from 12 end to DP.
Bottom Surface of Regulator Block
• Install plug (item 7) from kit into DP.
Independent Port to Common Port
Top Surface of Regulator Block
• Remove & retain plug (item 7) from DP.
12 End of Regulator Block
• Remove & discard lipseal (item 11), piston (item 12), spring (item 13),
bonnet assembly (item 14) and existing screws (item 15).
• Remove & discard regulator body assembly (item 8).
• Install plug (item 7) removed from top surface into SP.
• Install stamped plate (item 5) using new screws (item 6) from kit.
14 End of Regulator Block
• Remove bonnet assembly (item 14), lipseal (item 11), piston (item 12), &
spring (item 13) by removing screws (item 15).
• Remove regulator body assembly (item 8).
• Move plug (item 7) from DP to SP.
• Reinstall regulator body assembly (item 8).
• Reinstall lipseal (item 11), piston (item 12), spring (item 13), & bonnet
assembly (item 14) using existing screws (item 15).
Bottom Surface of Regulator Block
• Remove & discard plug (item 7) from DP.
Regulator to By Pass Plate
14 or 12 End of Regulator Block
• Remove & discard lipseal (item 11), piston (item 12), spring (item 13),
bonnet assembly (item 14) and existing screws (item 15).
• Remove & discard regulator body assembly (item 8).
• Install by pass plate (item 16) using new screws (item 17) from kit.
By Pass Plate to Regulator
14 or 12 End of Regulator Block
• Remove & discard by pass plate (item 16) & existing screws (item 17).
• Install regulator body assembly (item 8).
• Install o-ring (item 9), piston o-ring (item 10), lipseal (item 11), piston
(item 12), spring (item 13), & bonnet assembly (item 14) using new screws
(item 15) from kit.
Common Port to Selector
12 End of Regulator Block
• Remove & discard stamped plate (item 5) & screws (item 6).
• Install regulator body assembly (item 8).
• Install o-ring (item 9), piston o-ring (item 10), lipseal (item 11), piston
(item 12), spring (item 13), & bonnet assembly (item 14) using new screws
(item 15) from kit.
Top Surface of Regulator Block
• Install plug (item 7) from kit to DP.
Independent Port to Selector
Bottom Surface of Regulator Block
• Remove & retain plug (item 7) from DP.
12 End of Regulator Block
• Remove bonnet assembly (item 14), lipseal (item 11), piston (item 12), &
spring (item 13) by removing screws (item 15).
• Remove regulator body assembly (item 8).
• Move plug (item 7) from DP to SP.
• Reinstall regulator body assembly (item 8).
• Reinstall lipseal (item 11), piston (item 12), spring (item 13), & bonnet
assembly (item 14) using existing screws (item 15).
14 End of Regulator Block
• Remove bonnet assembly (item 14), lipseal (item 11), piston (item 12), &
spring (item 13) by removing screws (item 15).
• Remove regulator body assembly (item 8).
• Move plug (item 7) from DP to SP.
• Reinstall regulator body assembly (item 8).
• Reinstall lipseal (item 11), piston (item 12), spring (item 13), & bonnet
assembly (item 14) using existing screws (item 15).
Selector to Common Port
12 End of Regulator Block
• Remove & discard lipseal (item 11), piston (item 12), spring (item 13),
bonnet assembly (item 14) and existing screws (item 15).
• Remove & discard regulator body assembly (item 8).
• Install stamped plate (item 5) using new screws (item 6) from kit
Top Surface of Regulator Block
• Remove & discard plug (item 7) from DP.
Selector to Independent
12 End of Regulator Block
• Remove bonnet assembly (item 14), lipseal (item 11), piston (item 12), &
spring (item 13) by removing screws (item 15).
• Remove regulator body assembly (item 8).
• Remove & retain plug (item 7) from SP.
• Reinstall regulator body assembly (item 8).
• Reinstall lipseal (item 11), piston (item 12), spring (item 13), & bonnet
assembly (item 14) using existing screws (item 15).
14 End of Regulator Block
• Remove bonnet assembly (item 14), lipseal (item 11), piston (item 12), &
spring (item 13) by removing screws (item 15).
• Remove regulator body assembly (item 8).
• Move plug (item 7) from SP to DP.
• Reinstall regulator body assembly (item 8).
• Reinstall lipseal (item 11), piston (item 12), spring (item 13), & bonnet
assembly (item 14) using existing screws (item 15).
Bottom Surface of Regulator Block
• Install plug (item 7) removed from 12 end into DP.
Spring Controlled to Air Controlled
(Note: Plug (item 21) on 12 end must be removed and retained regardless of
which end is to be converted)
14 &/or 12 End of Regulator Block
• Remove & discard spring (item 13), & bonnet assembly (item 14) by removing
screws (item 15).
• Install spacer (item 18), lipseal (item 11), non venting piston (item 19), & air
pilot bonnet (item 20) using existing screws (item 15).
Bottom Surface of Regulator Block
• Install plug (item 21) removed from 12 end into 12.
Spring Ranges
14 &/or 12 End of Regulator Block
• Remove bonnet assembly (item 14) by removing screws (item 15) & discard
old spring (item 13).
• Install spring (item 13), & bonnet assembly (item 14) using existing screws
(item 15).
Air Controlled to Spring Controlled
Bottom Surface of Regulator Block
• Remove and retain plug (item 21) from 12.
14 &/or 12 End of Regulator Block
• Remove & discard spacer (item 18), lipseal (item 11), non venting piston
(item 19), & air pilot bonnet (item 20) by removing screws (item 15).
• Remove regulator body assembly (item 8).
• Install plug (item 21) removed from bottom surface into 12 (12 end only).
• Reinstall regulator body assembly (item 8).
• Install piston o-ring (item 10), lipseal (item 11), piston (item 12), spring
(item 13), & bonnet assembly (item 14) using existing screws (item 15).