Parker S6N-DN Manual

SOLENOID VALVE
Type S6N-DN
Port Size 5mm (3/16")
FOR AMMONIA, R12, R22, R502
AND OTHER COMMON REFRIGERANTS

FEATURES

• Standard Coil Housing Meets NEMA 3R and
NEMA 4 - Rain Tight
• Coil Housing Surpasses NEMA Salt Spray Test
• Plunger-Needle Assembly Same for S4A, S5A,
S8F, S6A
• Replaceable PTFE Seat
• Molded Class "B" Coil Construction
• Same Coil Fits All Refrigerating Specialties
Solenoid Valves
• Pilot Light Available
• Stainless Steel Needle
• Manual Opening Stem
• Design Pressure (PS): 25 bar (362 PSIG)
• Complies with Pressure Equipment Directive 97/23/EC
Seat Assembly
Tight shut-off
with
replaceable
PTFE seat
10
Seal
Cap
17
Refrigerating Specialties Division
310222
Coil Assembly
One coil size
fits all R/S
industrial
solenoid valves.
6
Plunger Needle
Assembly
Direct Acting,
Normally
Closed
9
Manual
Opening
Stem
12
Fig. 1
BULLETIN DN30-90
Type S6N-DN
February 2002
Installation and Service Information

Description

This compact, heavy duty, direct acting, steel (1213 C.R.S.) bodied
Solenoid valve is suitable for Ammonia. R-12, R-22 R-502 and other
common refrigerants for liquid lines, refrigerant oil lines, and as a pilot
valve to actuate remote gas powered valves and other pilot actuated
devices. The plunger-needle assembly is also used with most other
Refrigerating Specialties Industrial Solenoid Valves. This valve is
usually ordered with a close-coupled stainless steel screen strainer.
(See current Bulletin DN00-10 for strainer information.)

Purpose

A solenoid valve is an electrically operated device used to control the
flow of liquids or gases in a fully open or fully closed configuration.
The S6N is a normally closed solenoid valve to control the flow of
refrigerant. Like all Refrigerating Specialties Solenoid Valves, this valve
does not modulate. When electrically energized, it opens wide; when
de-energized, the valve closes to stop flow in the normal direction.
This valve is direct acting; the valve needle is lifted and held open
Electrically by the solenoid coil. No pressure drop or flow is required
to open or hold open this valve. Thus, the S6N Solenoid Valve is ideal
for use as a pilot solenoid valve. Although too small for suction line
applications in most cases, the S6N is often used as a pilot solenoid
valve to actuate gas powered valves in suction lines. This valve can
also automatically stop liquid flow to thermal expansion valves, float
valves or hand expansion valves.

Principles of Operation

This is a normally closed direct operated solenoid valve. When the
solenoid is energized, the plunger needle assembly is lifted up and
held open mechanically by the pull of the solenoid coil. Consequently,
the S6N will open and remain open with no pressure drop across the
valve or flow through the valve.
Operation is as follows: Starting with a closed valve; when energized,
#6 Solenoid Coil forms a magnetic field which pulls #9 Plunger-Needle
Assembly upward pulling it up and away from its #10 Seat Assembly
to permit fluid travel through the valve. When de-energized, the spring
in the #9 Plunger-Needle-Assembly forces the valve closed.

Manual Opening

To manually open the S6N Solenoid Valve, cautiously remove #17
seal cap and turn #12 Manual Opening Stem in (clockwise viewed
from beneath.) The rising stem will lift the valve needle from its seat
and permit flow. To resume automatic operation, turn #12 Manual
Opening Stem out (counter-clockwise viewed from beneath) until it
stops and replace #17 Seal Cap.
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I S O 9 0 0 1 C E R T I F I E D