Fisher® 1B0 pages

Product Bulletin
61.9:1B
D100181X012
June 2010
1B Pump Governor
Fisherr 1B and 1BR Constant-Pressure
Pump Governor Actuators
The Fisher 1B pump governor actuator (figures 1
and 2) is used to maintain a constant discharge
pressure on steam driven turbine or reciprocating
pumps and for pressure reducing or pressure relief
applications. Typical pump governor applications
include fire pumps, boiler feedwater pumps, and
industrial or refining pumps where the discharge
medium is oil, steam, air, or other noncorrosive fluid.
The 1BR pump governor actuator is combined with a
push-down-to-open valve for service as a relief
governor. A relief governor is used to divert excess
pump discharge to the suction side of the pump.
Features
D Rugged Construction—Brass and steel
construction combats wear for long service life.
D Ease of Maintenance—Few moving parts and
easy access reduce maintenance and downtime.
D Ease of Adjustment—Readily accessible
spring adjustment without removing any parts.
D Leakfree Service—Leakfree piston cups
available to 66_C (150_F).
D Fast Acting— Direct-operated configuration
provides fast speed of response.
www.Fisher.com
W2232-1 / IL
Figure 1. Fisher 1B Actuator on Direct-Acting easy-et Valve