Robertshaw 83939-E1 User Manual

F

2317 (R

Sales Manual Section 332

PRODUCT SPECIFICATION PS 83939-E

Lockout Relay

83939-E1

GENERAL DESCRIPTION

The No. 83939-E1 Lockout Relay is a two-way,
diaphragm-actuated, non-venting, normally open
valve. It is used in the safety system to lock out or
block certain portions of the control system or a line in
a control system upon receipt of a signal at PORT 1.
(See Figure 1). It will reopen with the loss of pressure
at PORT 1, and has a connection which may be used to
cancel the actuating pressure at PORT 1.

SPECIFICATIONS

Construction:

Aluminum body; stainless steel cover,
bracket and springs; elastomer coated fabric
diaphragms and gaskets; stainless steel and
aluminum valve with resilient seat.

Supply Pressure: ...........................................

CAUTION: DO NOT EXCEED MAXIMUM PRESSURES

Maximum Pressure: ......................................

Mounting: .................................................................

Dimensions: ...................................................

Connections: ................................................

Approximate Shipping Weight: .............

Ordering Information:

See Figure 2.

See Figure 2.

Surface

See Figure 1.

1/8"-27 NPT.

12 ozs. (.340 kg)

Specify: No.
83939-E1

INSTALLATION

A. General

Tubing and fittings used to connect the relay
must be free of chips, dirt, and moisture or other
foreign material.

It is recommended that an "anti-seize" type
thread compound be applied to the second or third
male thread in moderate amount. Do not allow
compound to be deposited inside the relay. Thread
sealing tape is not recommended.

For continuous, trouble-free operation, the
supply to the relay must be clean and dry.

*AIR OR GAS

J. I. C. Symbol

B. Mounting

When installing the No. 83939-E 1 Lockout

Relay,
care should be taken to prevent any foreign matter
from entering the ports. Provisions should be
made to
prevent foreign matter from entering the ports
which are left open to the atmosphere.

The relay may be installed in any position, but
vertical (upright) is recommended. The relay
should be
securely mounted, using the two slots (clearance
for No. 10 screws), provided in the mounting
bracket (See Figure 1).

orm No. P-

ev. B)

1

DIMENSIONS

NOTE

NOTE

Figure 1

OPERATION (See Figure 3 )

With no pressure applied to the diaphragm
through Port 1, Port 3 (supply port) is connected
through this normally open relay to Port 2.

When sufficient pressure is applied to the
diaphragm through Port 1, the stem moves down and
forces the lower poppet on seat,

: Graph A indicates actuating pressure (Port

1) required to keep valve closed at various
supply pressures (Port 3). Also, Graph A
indicates actuating pressure (Port 1) minus
equalizing pressure (Port 4) required to
keep valve closed at various supply
pressures (Port 3).

closing Port 3 to Port 2. Loss of pressure through Port
1 will allow the stem to return to its original position.
At the same time, the lower spring will force the
lower poppet off seat, opening Port 3, again, to Port

2. Also, the relay may be reopened by applying an
equalizing pressure through Port 4.

: Graph B indicates decreasing actuating

pressure (Port 1) required to open valve at
various supply pressures (Port 3). Also,
Graph B indicates decreasing actuating
pressure (Port 1) minus equalizing
pressure (Port 4) required to permit same
action.

CAUTION: DO NOT EXCEED MAXIMUM PRESSURES.

Figure 2

2