Type 6500/6600 Large Flow Capacity Volume Boosters

Rapid Stroke Capability in a Rugged Aluminum or Stainless Steel Casing

The Type-6500 aluminum and Type-6600 stainless steel volume boosters are 1:1 signal to output relays that are utilized in applications that require high flow capacity. Typically they are used to increase throttling speed of large volume valve actuators. They are suitable for either diaphragm or piston actuators. A fixed deadband and adjustable bypass valve combine to allow small incremental downstream adjustment without opening the main booster valve. The bypass valve is used to adjust dynamic response to provide stable operation over a wide range of actuator sizes.


Signal/Output Ratio 1:1

Supply Pressure

250 psig (17.0 BAR) Maximum

Signal Pressure 150 psig (10.0 BAR) Maximum

Temperature Limits:

-40 to 200 0F (-40 to 93 0C)
-62 to 194 0F (-52 to 90 0C) low temperature option

Maximum Flow Coefficients (Cv)


Forward Exhaust
  3/4" 8.0 8.0
  1" 9.0 8.0
Exhaust Capacity
5 psig (0.35 BAR) above setpoint
150 scfm (4,245 NL/min)
150 scfm (4,245 NL/min)

Output Accuracy

2.0% of span
Deadband Under 0.2 psig (.01 BAR)

Suppy Pressure Effect 100 psig (7 BAR) change in supply pressure

0.3 psig (.02 BAR)
Signal Port 1/4" NPT
Supply/Output Port 3/4 or 1" NPT
Exhaust Port 3/4" NPT
Gauge Port (2) 1/4" NPT
Feedback Port (Option) 1/4" NPT
Weight Type-6500 Aluminum 6.5 lbs (2.95 kg)
  Type-6600 Stainless Steel 15.0 lbs (6.80 kg)

Materials of Construction

Materials Type-6500 Type-6600
Housing Aluminum 316 Stainless Steel
Bolting Zinc Plated Steel 316 Stainless Steel
Other trim Aluminum 316 Stainless Steel
Internal Components Aluminum 316 Stainless Steel
Low Temperature Option:


Part Number Casting Material Porting
6500-EA Aluminum 3/4" NPT
6500-FA Aluminum 1" NPT
6600-ES 316 Stainless Steel 3/4" NPT
6600-FS 316 Stainless Steel 1" NPT

OPTIONS - Add proper letter onto end of model number:

F - Feedback Port

L - Low Temperature Option


S - Stainless Steel Trim (Type-6500 only)

X - ATEX 2014/34/EU


Mounting Bracket (zinc plated steel): P/N 449-542-040.

Mounting Bracket (316 stainless steel): P/N 449-542-041.

3/4" NPT Exhaust Screen/Muffler Fitting:
Plated Steel P/N: 445-761-006
316 Stainless Steel: P/N: 445-761-007