to prevent Water Hammer, in multi-story buildings and vertical turbine
pump installations, when pumping from a well to an elevated reservoir.
The Valve closes, SILENTLY! Low in cost, reliable and requires no
regular maintenance. Principle of operation: When pump stops, spring
forces disc closed instantly against slight pump head at zero velocity,
(theoretically a static condition) hence, SILENT CLOSURE! Body -
Cast Iron, Ductile Iron, Cast Steel, Stainless Steel or Bronze.
Internals - Bronze, Stainless. Ratings 125# thru 600# class.
Available Immediate or maximum 8 weeks.
Sizes 1" thru 10".
Very short length, results in lowest purchase and installation
costs. Double doors are spring loaded for fast non-slam shut-off
against rubber seat in the body. Recommended for Refineries, Petro
Chemical Plants, and Water Pump Stations, Body and Door material-Iron,
Steel, Bronze or Stainless. Spring and Hinge Pin-Stainless. Body
Seal-Buna-N or other materials for higher temperature rating.
Ratings 125#, 250#, 300#, 600#, 900#, 1500#, 2500# class.
Stock to 12 weeks.
Sizes 2" thru 72".
Flapper Swing Check Valves
Unique Simple Design - no moving parts. The Flapper does not swing
from a Hinge Pin, it flexes open. The seat is on a 45 degree angle.
The Flapper travels 35 degrees from open to close, very fast,
and before column reversal can occur, hence, it's non-slamming.
The flapper is made of synthetic rubber without any moving parts.
The valve can be buried and requires no regular maintenance. Recommended
for Water, Sewage, Gas, Oil and Rubber lined for Chemicals. Cast
Iron Body rated 125# class 175 PSI working pressure.
Stock to 4 weeks.
Sizes 2" thru 36" (larger sizes available).
Disc Check Valves
The most reliable and efficient check valve for the engineer.
The disc pivot point is off center, a precise constructed feature
to slow the closing of the disc. Split body design increased flow
area around the disc 40%, hence, the lowest head loss. Seating
is metal to metal. Valve life rating minimum 25 years. Available
as a free swing check; free open control and close; or control
open and close. The body is available in Cast Iron, Ductile Iron,
Cast Steel or Stainless Steel. Pivot Pins and Seats-Bronze or
Stainless. Highly recommended for maximum efficiency in Power
and Water Pumping Stations. Ratings 125#, 250#, 300#, 600# class.
Cast Iron from stock.
Steel 16 weeks.
Sizes 2" thru 72".
Air Release Valves function
to release air pockets that collect at each high point of a full
pressured pipeline. Air Release Valves can open against internal
pressure, because the internal lever mechanism multiplies the
float force to be greater than the internal pressure. This greater
force opens the orifice whenever air pockets collect in the valve.
Air Release Valves are essential for pipeline efficiency and water
Sizes 1/2" thru 3". Sizes 4" thru 3".
Are float operated, having
a large discharge orifice, equal in size to the valves inlet.
Air and Vacuum valves allow large volumes of air to be exhausted
from - or - admitted into a water pipeline as it is being filled
or drained. As the pipeline fills, water enters the Air Valve,
raises the float and shuts-off. When draining the pipeline, the
float drops, allowing air to enter, preventing vacuum, possible
pipeline collapse and damaging water column separation. Air &
Vacuum Valves are an efficient means to fill and drain pipelines.
Sizes 1/2" thru 6".
|As the name
implies, combines features of Air & Vacuum Valves and Air Release
Valves. These valves are also called Double Orifice Air Valves.
These Valves are installed on all high points of a system where
it has been determined dual function Air & Vacuum and Air Release
Valves are needed to vent and protect a pipeline. Generally, it
is sound engineering practice to use (CAV) instead of simple purpose
Air & Vacuum Valves.
(CAV) are available in two body styles - (1) single body combination
(2) custom built combination (CCAV)
with two bodies.
Release Valves & Air And Vacuum Valves for Sewage Lines
Operate same as Air Valves for Water, differing only in appearance
with elongated taller bodies. Elongated bodies minimize clogging
by permitting use of a much longer float stem, to prevent the sewage
from fouling up the mechanism. For ease of maintenance, Flushing
Attachments are recommended with the Valves, as shown. When adding
Sewage Air Valves to your pipeline, the same criteria applies, as
with the standard Air Valves. However, the potential for air entrapped
with Sewage pipelines, is even greater than that found in water
lines, because Sewage media generates large quantities of gases.
Therefore, it is recommended each high point be protected with an
automatic Sewage Air Release Valve.