Specifications
3
Versa exercises diligence to assure that information contained in this catalog is correct, but does not accept re-
sponsibility for any errors or omissions. Versa also reserves the right to change or delete data or products at any
time without prior notication. To be sure the data you require is correct, consult factory.
Series B316 Three-Way Valves (3/2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4-14
CONTENTS GUIDE
General Description
The B316 Series is a complete line of compact, rugged Three-Way (3/2), side-ported valves, constructed of 316 stainless
steel (conforms to NACE standard MR-01-75). They are designed for use particularly in corrosive environments and to control
a variety of aggressive media as well as air. O ring packed poppets provide bubbletight sealing throughout the operating
pressure range and when used to operate small volume appliances this feature conserves valuable instrument air.
Actuations include solenoid/pilot (including those suitable for Ordinary, Hazardous or LOW-WATT service ), remote
pressure pilot, manual, and mechanical. Many combination actuators and special function types can also be provided.
Consult the factory for these items.
Solenoid actuated valves can be 2-position, single or double solenoid. A manual override option is available for
most types.
Remote pressure pilot models can be 2-position, single or double pilot.
Manually actuated valves are 2-position, push button panel mounting types and are offered with or without
guarded push buttons. An optional lid knob operated type is also available.
Mechanically actuated valves are 2-position and are supplied with a roller for cam interface.
General Description
Series B900 Main Supply Reset & Indicating Relay Valves . . . . . . . . . . . . . Page 16-21
The B900 Series is comprised of Three-Way (3/2) Manual/Pilot Operated Main Supply Reset valves and Three-Way
(3/2) Indicating Relay valves. All are constructed of 316 stainless steel (meets NACE standard MR-01-75). They are de-
signed for use particularly in corrosive environments and to control aggressive media as well as air. O ring packed
poppets provide bubbletight sealing throughout the operating range and when used to operate small
volume appliances this feature saves valuable instrument air.
Main Supply Reset valves can function as master relay valves and are generally pilot operated-spring
return, 2-position valves that are provided additionally with a means of manual operation. The function
of the Main Supply Reset valve is to control the supply of pressure to a system or portion of a system. If
a problem is sensed at some point in the system, the Main Supply Reset valve will shift to dump system
pressure from that portion of the circuit controlled by that Main Supply Reset valve. The shifting of the Main
Supply Reset valve is accomplished by a pilot device which is an integral part of the valve. The pilot is
pressurized when the system is running normally, but when a problem is sensed, the pilot is depressurized
and the valve shuts off the pressure to the main system or that portion of the main system that the valve
controls. Several variations of reset are available. One example is a “latching pilot” whereby when pilot
pressure returns, the valve will not shift to open the supply to the main system until the valve is manually
reset. The manual portion of the reset can also be latching or non-latching. Most Main Supply Reset valves can also be equipped with an integral
visual indicator that indicates when pressure is present in the pilot chamber. Complete functional descriptions of each valve can be found on the
pages within this valve series.
Indicating Relay valves are of the First Out-Receiving or First Out-Transmitting type. They have two functions generally. First, to indicate visu-
ally on a panel that a circuit malfunction has occurred and secondly, to quickly exhaust operating pressure from the system through the Main Sup-
ply Reset valve.
Series B500 Indicating Relay Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 21-22
General Description
The B550 Series Indicating Relay valves are Three-Way (3/2) First Out Indicating valves. They are of the First Out-Receiv-
ing type, First Out-Transmitting type or First Out-Bypass type. All are constructed of hard coated aluminum (MIL-A-
8625E, Type III, Class 1) to provide reasonable resistance to extreme environmental conditions. Bubbletight seal-
ing, accomplished by employing wafer seals, conserves valuable instrument air throughout the operating
pressure range.
First out Indicating Relay valves have two functions. First, to indicate visually on a panel that a circuit
malfunction has occurred and secondly, to quickly exhaust operating pressure from the system through
the Main Supply Reset valve. The Indicating Relay valve with the Bypass function additionally provides the
means to bypass the specic malfunctioning circuit without shutting down associated circuits.
Manual Shut-Off Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
General Description
For emergency shut down systems a Two-Way Manual Bleed valve and a Three-Way Manual Block & Bleed
valve are available. Both valves are constructed of 316 stainless steel (meets NACE standard MR-01- 75),
and may be used as panic valves to quickly depressurize the system in order to get immediate shut down.
The Two-Way Manual Bleed valve is closed during normal operation, but manual actuation or back-
pressure to the outlet port will dump system pressure to atmosphere.
The Three-Way Manual Block & Bleed valve connects the inlet to the outlet during normal operation. Manual actuation
or back-pressure to the exhaust port causes the inlet to be blocked while the outlet dumps system pressure to atmosphere.
316 (Three-way Valves)
550 (Indicating Relay Valves)
900 (Main Supply Reset & Indicating Relay Valves)
This Catalog
Covers...
B
SERIES
and
Manual Shut-Off Valves