About Us
AST Installation
Service Department
Coming Attractions
Aviation Systems
Aboveground Systems
Underground Systems
Monthly Specials
 
Employment Opportunities
 

Specializing in the sales, service and installation of petroleum equipment
Valves
Bypass
                   

MR174-0100AV
  MORRISON 174 BYPASS VALVE —
Not a pressure regulating device.
•Used in situations where pressure control
   —such as bypassing a pump to reduce
  pressure at the outlet— is necessary.
•Available in pressure settings from 20 to
  75psi. Valve settings are adjustable plus or
  minus 5 to 10psi from the factory set point.
•Brass body construction. Includes stainless
  steel spring and Teflon® packing.

  MODEL
MR174-0100AV
MR174-1300AV
MR174-1400AV
MR174-1500AV
MR174-1600AV
MR174-1750AV
MR174-2200AV
MR174-2300AV
MR174-2400AV
MR174-2500AV
MR174-2600AV
MR174-2750AV

DESCRIPTION
Valve, bypass, brass, 20psi, 1.5"
Valve, bypass, brass, 30psi, 1.5"
Valve, bypass, brass, 40psi, 1.5"
Valve, bypass, brass, 50psi, 1.5"
Valve, bypass, brass, 60psi, 1.5"
Valve, bypass, brass, 75psi, 1.5"
Valve, bypass, brass, 20psi, 2"
Valve, bypass, brass, 30psi, 2"
Valve, bypass, brass, 40psi, 2"
Valve, bypass, brass, 50psi, 2"
Valve, bypass, brass, 60psi, 2"
Valve, bypass, brass, 75psi, 2"

  Inquiries?
Call us 8am-5pm
Pacific time, or
email us.
   
               

MR174AL-3300AV
  MORRISON 174AL BYPASS VALVE —
Not a pressure regulating device.
•3" valve used in situations where pressure
  control  —such as bypassing a pump to
  reduce pressure at the outlet— is necessary.
•Available in pressure settings from 20 to
  75psi. Valve settings are adjustable plus or
  minus 5 to 10psi from the factory set point.
•Aluminum body construction. Includes
  stainless steel spring and Teflon® packing.
  MODEL
MR174AL-3200AV
MR174AL-3300AV
MR174AL-3400AV
MR174AL-3500AV
MR174AL-3600AV
MR174AL-3750AV

Parts
MR174AL-03032S
MR174-01092S
MR174AL-S02092S
MR174AL-37592S

DESCRIPTION
Valve, bypass, alum, 20psi, 3"
Valve, bypass, alum, 30psi, 3"
Valve, bypass, alum, 40psi, 3"
Valve, bypass, alum, 50psi, 3"
Valve, bypass, alum, 60psi, 3"
Valve, bypass, alum, 75psi, 3"


Spring, for 3" aluminum bypass
Screw, set, 30, 40, 50psi
Screw, set, 20, 60psi
Screw, set, 75psi

   
               
Expansion
relief
             

MR77-0200AV
  MORRISON 77 EXPANSION RELIEF VALVE —
•Utilized on aboveground storage tank piping
  to relieve excess pressure due to outside
  temperature rise.
•.25" valve is especially suited to existing
  pipelines and bypassing a valve that doesn't
  have expansion relief.
•Approx. 40psi relief setting.
•Copper tubing is not supplied.
  MODEL
MR77-0200AV

Parts
MR77-02062F
MR77-02072F

DESCRIPTION
Valve, expansion relief, .25"


Elbow, .25"
Connector, .25"

   
               

MR78DI-0100AV
  MORRISON 76DI/78DI EXP RELIEF VALVE —
•Used on aboveground storage tank piping
  to relieve excess pressure.
•.5" valve allows product to return to the
  storage tank.
•Model 76DI: Precise pressure settings (25
  or 50psi). Primarily used with leak detection
  systems.
•Model 78DI: Approximate pressure settings
  of 25psi, 40psi (standard) and 100 psi.
•Ductile iron construction

  MODEL
Precise
MR76DI-0100AV
MR76DI-0200AV

Approximate
MR78DI-0100AV
MR78DI-0200AV
MR78DI-0300AV

Parts
MR78-01032S
MR78-02052S
MR78-03062S

DESCRIPTION

Valve, expansion relief, 25psi, .5"
Valve, expansion relief, 50psi, .5"


Valve, expansion relief, 25psi, .5"
Valve, expansion relief, 40psi, .5"
Valve, expansion relief, 100psi, .5"


Spring, stainless steel, for 25psi
Spring, stainless steel, for 40psi
Spring, stainless steel, for 100psi

   
               

OCV108-2
  OCV MODEL 108 PRESSURE VALVE —
•Acts as a backpressure or pressure
  sustaining valve, maintaining constant
  upstream pressure regardless of any
  fluctuation in downstream demand.
  Typically mainline size, the maximum
  velocity through the valve should not
  exceed 25 ft/sec.
•When used in a bypass line, this model
  acts as a relief valve to protect the system
  against potentially damaging surges. Size is
  determined by the amount of pressure that
  is required to lower the inlet pressure. A
  general guideline is to use 60% of the rated
  pump flow. Capable of intermittent flows
  of up to 45 ft/sec.
•Quick opening with controlled closing.

•Size range: 1.25" to 24". These valves are
  typically 50-60% of the mainline size.
•Flow range maximums: 115gpm @ 25 ft/sec
  or 210gpm @ 45 ft/sec (1.25") low end,
  31,250gpm @ 25 ft/sec or 56,000gpm @
  45 ft/sec (24") high end.

  MODEL
OCV108-2
OCV108-3

OCV108-4

OCV108-34

OCV108-8

DESCRIPTION
Valve, press relief/press sustaining
Valve, press relief/press sustaining
w/check feature
Valve, press relief/press sustaining
w/solenoid shutoff
Valve, press relief/press sustaining
w/solenoid shutoff, check feature
Valve, press relief only w/air
release, vacuum breaker

DOCS
Features

Install/ops
108-2
108-3

 
   
         

OCV118-3
  OCV MODEL 118/108SA SURGE VALVE —
•Designed to be installed in a bypass
  line to assist in preventing damaging
  surges that occur in pumping systems
  when the pump suddenly stops.
•Differs from conventional relief valves in
  that while standard valves only open when
  a high pressure wave hits, the surge
  protection valve senses the precursor of
  the high pressure wave (pump power
  failure or low pressure wave) and opens
  the valve in anticipation of the high
  pressure wave that follows.
•Model 108SA is a hydraulic model requiring
  no electrical.
•Model 118 is electro-hydraulic. It features
  an electrical power connection to the
  pumping system for opening upon loss
  of poweror on a pressure switch 'low
  pressure' signal. The valve closes after an
  adjustable pre-determined time on power
  failure or low pressure opening. Pilot-
  operated, hydraulic high pressure relief
  opening.
•Size range: 1.25" to 24".

  MODEL
Hydraulic
OCV108SA

Electro-Hyd
OCV118-2

OCV118-3

OCV118-4

DESCRIPTION

Valve, surge, low pressure open/
high pressure relief

Valve, surge, power failure open,
high pressure relief
Valve, surge, power failure open,
low press open/high press relief
Valve, surge, power failure open,
low press open/high press relief,
Surge Commander control

DOCS
Features

Install/Ops
118-3
 
               
Pressure
differential
             

OCV110
  OCV MODEL 110 DIFFERENTIAL VALVE —
•Controls the pressure difference between
  two points. Pilot-operated, modulating
  type valve.
•Differential is adjustable over a complete
  range of control springs.
•Installed on the discharge side of a pump.
  Valve senses high pressure on the pump
  discharge side (the valve inlet) and low
  pressure at the pump suction. The valve
  modulates to hold differential pressure
  constant and thus assure that the pump
  is at its optimum point on the curve.

•Size range: 1.25" to 24".
•Flow range maximums: 115gpm @ 25 ft/sec
  (1.25") low end, 31,300gpm @ 25 ft/sec
  (24") high end.

  MODEL
OCV110
OCV110-1

OCV110-2

OCV110-12


DESCRIPTION
Valve, differential control
Valve, differential control w/check
feature
Valve, differential control w/solenoid
shutoff
Valve, differential control w/check
feature, solenoid shutoff

DOCS
Features

Install/ops
 

Pump control
             

OCV125-27
  OPW MODEL 125 PUMP CONTROL VALVE —
•Electronically interfaced with a pump motor,
  this valve is designed to effectively
  eliminate surges associated with the starting
  and stopping of a pump motor. It opens
  and closes at an adjustable speed.
•Multiple configurations and combinations.
•Includes built-in reverse flow check feature.
•Automatically shuts off pump motor upon
  loss of pump discharge pressure.

•Size range: 1.25" to 24".
•Flow range maximums: 85gpm @ 25 ft/sec
  or 127gpm @ 30 ft/sec (1.25") low end,
  25,000gpm @ 20 ft/sec or 37,500gpm @
  30 ft/sec (24") high end.
  MODEL
OCV125-1B
OCV125-2

OCV125-7
OCV125-8

OCV125-13
OCV125-13E
OCV125-14
OCV125-15
OCV125-27

OCV125-134
OCV125-137
OCV125-157
OCV125-1347


DESCRIPTION
Valve, pump differential control
Valve, pump control w/power
actuation
Valve, pump control w/lift check
Valve, pump control w/controlled
closing feature
Valve, pump control, press sustaining
Valve, pump control, suc sustaining
Valve, pump control, press reducing
Valve, pump control, flow rate control
Valve, pump control w/power
actuation, lift check feature
Valve, pump control, press sustaining/
reducing
Valve, pump control, press sustaining
w/lift check feature
Valve, pump control w/rate of flow
control, lift check feature
Valve, pump control, press sustaining/
reducing w/lift check feature.

DOCS
Features

Install/ops
125-7
125-27
 

©2009 Mascott Equipment Co