Emerson 6365 Series Instruction Manual

Instruction Manual Type 6365 and 6358 Series
D102692X012
February 2024
Type 6365 and 6358 Series Pilots
Introduction
Scope of the Manual
This Instruction Manual includes installation, maintenance
and parts ordering information for the Type 6365 and
6358 Series relief pilots. For installation and operation of a
complete relief valve assembly, refer to separate manuals
(such as the Type EZR, 399A, 63EG, 289P, 1805P or
1808 relief valve).
W7393
Pilot Descriptions
TYPE 6358EB MOUNTED
Type 6365—Set pressure range from 14 in. w.c. to
ON TYPE EZR
2 psig / 35 mbar to 0.14 bar. This pilot has a high gain
restriction standard.
Type 6358—Set pressure range from 3 to 125 psig /
0.21 to 8.62 bar. This pilot has a restriction plug.
Type 6358B—Set pressure range from 2 to 125 psig /
0.14 to 8.62 bar. This pilot is available with a high,
medium or low gain restriction.
Type 6358EB—Set pressure range of 75 to 350 psig /
5.17 to 24.1 bar. This pilot is available with a high or
low gain restriction.
Type 6358EBH—Set pressure range of 250 to 600 psig /
W6834
17.2 to 41.4 bar. This pilot is available with a high or
low gain restriction.
TYPE 6358B MOUNTED
Relief Valve ON TYPE 289P
The pilot bleeds constantly while the relief valve is
in operation. The pilot does not bleed when inlet
pressure is below set pressure. The pilot exhaust
can be connected directly to the main valve exhaust
pipe if the pilot connection and the exhaust pipe are
designed to prevent significant backpressure buildup
during full-flow conditions.
The pilot restriction codes for Types 6365, 6358B,
6358EB and 6358EBH are indicated by a letter
stamped on the bottom of the pilot body: an H for
TYPE 6358B MOUNTED
ON TYPE 1805P
the yellow, high gain restriction (standard); S for the
W6913
red, medium gain restriction; and L for the blue, low
gain restriction. The high gain restriction has the
Figure 1. Type 6358B Relief Pilot Mounted on Main Valves
lowest buildups and fastest speed of response.