Dwyer SSM - Manual (Page 4)

NEW SPIRAL
RETAINING RING
INNER FLANGE
RING
SIGHT TUBE
ASSEMBLY
STATIC
O RING
SEAL
CORE TUBE/
FLOAT
ASSEMBLY
BODY
MAGNET(S)
fiGURe 2: paRtiaLLY eXpLoDeD DRaWinG of SeRieS SSM
aLL MetaL fLoWMeteRS
It is not necessary to remove the flowmeters from the pipeline for
cleaning or replacing parts. The body remains plumbed into the pipe,
allowing easy service and even installation of the different sensing
elements to accommodate new flow rates or fluids. Figure 2 shows some
of the major components. Step by step disassembly and reassembly
instructions and photos are included in the following.
CAUTION: BE SURE PRESSURE IS FULLY VENTED AND FLUIDS
COMPLETELY DRAINED BEFORE DISASSEMBLING THE
FLOWMETER. DISCONNECT POWER TO ELECTRONIC
ACCESSORIES. WEAR SAFTEY GLASSES AND PROTECTIVE
CLOTHING IF THERE IS A CHANCE OF EXPOSURE TO
HAZARDOUS FLUIDS!
Remove the raceway cover by removing the stainless screw at the
top, and lift it up and off the meter. Remove the black phenolic
raceway, being careful not to displace the ball indicator. Remove the
ball indicator by hand, and set it where it will not be lost.
Using a screwdriver, carefully pry the notched end of the spiral
retaining ring out of the body groove. Move the screwdriver blade
under the ring- the action is very much like putting a key on a key ring.
Continue until the entire spiral ring has been removed from the
groove (please see the photo below).
1.
2.
Using hands only, pull the sight tube straight up out of the body with
a slight twisting motion, lifting it clear of the body and snorkel. The
inner flange ring will lift off with the sight tube.
Remove the float assembly by lifting it up and away from the snorkel.
The core tube assembly may then be lifted out. If stuck, CAREFULLY
pry at the top of the slot with a brass rod, taking care not to damage
the body or core tube. The spider ring and O-ring will come out with
the core tube. If the core tube is stuck, try removing the metal spider
ring first (please see the photo below).
3.
4.
inSpection & cLeaninG
Inspect parts for nicks, scratches, chips, wear, and contaminant build-up.
The edges of the core tube slot, ID of the core tube and OD of the piston
(largest section at the float assembly bottom) are precision machined.
Damage to these areas can destroy the meter’s accuracy. Also inspect
the O-ring, the bottom section of the sight tube, and the inside of the
upper body section. Damage to these areas may result in leaking. Clean,
rinse, and dry all parts carefully, including the O-ring, preferably with a
mild detergent and water and a soft cloth or soft tube brush. If solvents
are used, make sure they are compatible with meter parts.
CAUTION: DO NOT SCRAPE OR USE ABRASIVE MATERIALS
FOR CLEANING!!!
MeteR DiSaSSeMBLY