CVS Controls 67AFR User manual

1
Product Manual
CVS Type 67AFR Filter
Regulator
Introduction
This CVS Controls product manual includes
instructions for the installation, adjustment,
maintenance and parts ordering of the CVS Type
67AFR Filter Regulator.
All CVS Controls equipment should be installed,
operated and maintained by qualified personnel. If
you have any questions regarding this equipment,
contact your CVS Controls representative.
Ensure that the label of the control spring range is
updated to reflect any changes in field equipment,
materials, service conditions or pressure settings.
If any venting occurs or a leak develops in the
pressure system this indicates that service is
required. Failure to remove the regulator from
service for immediate maintenance may cause a
hazardous situation.
These regulators are often shipped installed on
other equipment. Information on that equipment
will be contained in separate manuals.
Description
The CVS Type 67AFR Filter Regulator is a self-
operated unit which provides continuous reduced
pressures in a variety of applications and service
conditions. Common use is as supply pressure
regulators for pneumatic instruments.
A cellulose filter is used with the CVS Type 67AFR
Filter Regulator and will remove particles greater
than 0.0016 inch (0.040 mm) in diameter.
In addition, these regulators contain integral low-
capacity relief valves. In this type of construction
the valve stem
Figure 1: CVS Type 67AFR Regulator
sits against an orifice in the diaphragm assembly.
When downstream pressure increases above the
set point, the diaphragm assembly moves off the
valve stem and excess pressure is vented through
a port hole tapped in the spring case.
Installation
Warning
Do not install any pressure equipment where
service conditions exceed the manufacturer’s
specifications. Over pressuring of regulator
may result in leakage, equipment damage or
injury. Excessive pressure can cause the
pressure-containing parts to burst, or
accumulated gas to explode. The CVS Type
67AFR Filter Regulator cannot be used with
hazardous gas unless vented to a safe area.
Australian Agents
www.globalsupplyline.com.au
[email protected]

CVS Controls Ltd
Product Manual: CVS Type 67AFR Filter Regulator
2
Specifications
Body Size and End Connection Style 1/4-inch NPT screwed
Maximum Allowable Inlet Pressure 250 psig (17 bar)
Outlet Pressure Ranges 3 to 100 psig (0.21 to 6.9 bar) available in four ranges. Refer to
Parts List Key 5
Maximum Emergency Outlet Pressure 50 psig (3.4 bar) over outlet pressure setting, or 110 psig (7.6
bar), whichever is greater
Pressure Registration Internal
Standard Elastomers -29 to 66C (-20 to 150F)
Material Temperature
Capabilities High Temperature Elastomers -18 to 188C (0 to 350F)
Installation continued
As with many regulators, the outlet pressure rating
on the CVS Type 67AFR Filter Regulator is lower
than the inlet pressure rating. If it is possible for
the actual inlet pressure to exceed the regulator
outlet pressure setting or the pressure ratings of
any downstream equipment, downstream over-
pressure protection is required. The low-capacity
internal relief feature of the CVS 67AFR provides
some limited downstream overpressure protection
but should not be relied upon to completely
safeguard against overpressure.
Debris in the service line or other external
conditions may cause damage to the regulator
even while it is operating within normal set
pressure ratings. Regular inspection should be
scheduled in addition to inspections after any
overpressure condition.
Note
If the regulator has been installed on another
unit prior to shipping, perform the
installation according to the instruction
manual for that unit.
For CVS Type 67AFR regulators shipped
separately, check the regulator, tubing and piping
for damage. Remove any foreign material. Install
the regulator ensuring that flow is from the IN to
the OUT as marked on the regulator body. Refer
to Figure 2 for cutout dimensions for a panel
mounted regulator.
To use the unit in regulator shutdown, properly
vent the regulator inlet and outlet pressures by
installing upstream and downstream vent valves
or providing some alternate means of properly
venting the inlet and outlet pressures.
For optimum filter drainage, position the drain
valve (Key 11) at the lowest possible point on the
filter cap (Key 9). Prevent plugging of the spring
case vent and keep the spring case from
collecting moisture, corrosive chemicals or other
materials by orienting the vent to the lowest
possible point on the spring case.
To change the filter/drain orientation, rotate the
filter cap with regards to the regulator body.
Change the spring case/vent orientation by
rotating the spring case in relation to the regulator
body.
Any CVS type 67 AFR Filter Regulator with a
tapped spring case can be vented remotely by
installing tubing or piping into the ¼-inch NPT vent
tapping. Install a screened vent cap in the end of
the tubing or piping to prevent clogging.
If using piping, apply pipe compound to threads
then proceed with making the connections. First
install the piping or tubing into the ¼-inch NPT
inlet connection. Unless the outlet connection has
been made at the factory to another unit, install
the piping or tubing to the outlet connection.
Warning
Never adjust the control spring to produce
pressure beyond its highest outlet pressure
range. Over pressuring the spring can cause
bursting of pressure containing parts, or
explosion of accumulated gas. If the range of
the control spring does not reach the desired
outlet pressure install a spring with the
proper range according to the maintenance
section.

CVS Controls Ltd
Product Manual: CVS Type 67AFR Filter Regulator
3
Installation continued
CVS Controls sets each regulator for the pressure
setting specified at the time of ordering. If no
setting was indicated, the outlet pressure will be
set at the midrange of the control spring.
Startup
Refer to Figure 2 for Key Numbers.
After completion of installation and adjustment of
downstream equipment, introduce pressure to the
unit by slowly opening the upstream and
downstream shutoff valves. During any startup or
adjustment, monitor the adjustment using
pressure gauges. Outlet pressure of the regulator
can be monitored using a gauge installed at a
downstream position, including the supply
pressure gauges of a pneumatic instrument where
the regulator is providing reduced pressure. If the
regulator has a tapped side outlet a gauge (Key
20, not shown) may be installed for monitoring. If
the regulator has no gauge but the side outlet has
been tapped and plugged, the side plug may be
removed and a temporary gauge installed.
During the adjustment procedure monitor the
outlet pressure with a gauge, if outlet pressure is
necessary; adjust the standard CVS Type 67AFR
regulator by loosening the locknut (Key 2) and
turning the adjusting screw or handwheel (Key 1).
Clockwise adjustment will increase the outlet
pressure setting, and counter-clockwise
adjustment will decrease the outlet pressure
setting. On some regulators, a closing cap (Not
shown) will have to be removed prior to
adjustment and replaced afterward. Locknuts or
handwheels are not used on panel-mounting
regulators.
Shutdown
1. Close the nearest upstream shutoff valve.
2. Close the nearest downstream shutoff valve.
3. Open the downstream vent valve and release
the pressure.
4. Open the upstream vent valve and release the
pressure.
5. If vent valves have not been installed, safely
bleed off inlet and outlet pressure and ensure
that the regulator contains no pressure.
Maintenance
Due to normal wear, internal parts must be
inspected and replaced regularly depending upon
the severity of service conditions. High pressure
drops and large amounts of impurities in the flow
stream accelerate wear on regulator and valve
parts.
To empty moisture from the filter cap (Key 9), by
periodically open the drain valve (Key 11).
Warning
Prior to performing maintenance operations,
isolate the unit from the pressure system and
vent all internal pressure.
Perform the following procedures when changing
the control spring or to inspect, clean or replace
any other parts.
Note
If the regulator has been installed with
sufficient clearance, the body assembly may
remain mounted on other equipment or in a
line or panel during maintenance.
To access the diaphragm assembly (Key 12),
control spring (Key 5) or upper spring seat (Key 3):
1. Loosen the locknut (Key 2, if used) and turn
the adjusting screw (Key 1) counterclockwise
to remove all compression from the spring.
2. Remove the machine screws (Key 18) and
separate the body assembly from the spring
case (Key 4).
3. Inspect the removed parts and replace if
necessary.
4. Ensure the registration (Sensing) hole is free
from debris and reassemble.
5. Verify the proper control spring setting
according to the “Startup” instructions and re-
mark the control spring label if necessary.

CVS Controls Ltd
Product Manual: CVS Type 67AFR Filter Regulator
4
Maintenance continued
To access the valve plug (Key 6) or filter element
(Key 15) for replacement or cleaning:
1. Remove the cap screws (Key 18) using a 12-
point socket wrench.
2. Remove the filter cap (Key 9) and gasket (Key
14).
3. The following parts may come off with the
filter cap, or may be removed individually:
retainer (Key 10), filter element (Key 15),
valve spring (Key 8), valve spring seat (Key
13) and valve plug and stem (Key 6). Keep all
parts together.
4. Inspect all parts and replace if necessary.
Ensure the valve plug seating surfaces are
clear of debris. If the filter element is dirty it
may be cleaned with solvent and blown dry.
Parts Ordering
To help CVS Controls assist you better, include the
regulator type number and other important data
stamped on the bottom of the filter cap and on the
control spring label. Refer to the following parts
list when ordering.
Figure 2: CVS Type 67AFR Regulator

CVS Controls Ltd
Product Manual: CVS Type 67AFR Filter Regulator
5
Parts List
Key No. Description Part #
Standard: Plated steel CVS1B798628982
Standard: Right Hand Thread, Zn CVS1B7992000A2
1 Adjusting Screw Handwheel (Optional) Right Hand Thread, Chrome Pl Steel CVS1U1715000C2
2 Locknut (not used with panel mounted regulators) CVS1A946324122
3 Upper Spring Seat, steel, zinc plated CVS1B798525062
4 Spring Case, Panel mounting, vented bonnet CVS67A0003
3 to 20 psig (0.21 to 1.4 bar) range, green CVS1B986027212
5 to 35 psig (0.34 to 2.4 bar) range, cadmium CVS1B788327022
30 to 60 PSIG (2.1 TO 4.1 bar) range, blue CVS1B788427022
5 Control Spring, plated steel
35 to 100 psig (2.4 to 6.9 bar) range, red CVS1K748527202
*6 Valve Plug and Stem Nitrile with Brass stem CVS1D5604000B2
7 Body 2 Outlets Aluminum with SST bushing CVS15A5969X042
8 Valve Plug Spring, Inconel CVS1C127337022
9 Filter Cap, aluminum CVS35A5963X012
*10 Retainer, plated steel (consists of Spring Washer, plated Stl) CVS15A5970X012
11 Drain Valve, Brass CVS1K4189
*12 Diaphragm Assembly (includes pl steel diaphragm
plate) Nitrile w/Brass relief valve seat CVS19A7667
13 Non Relief Diaphragm Assembly (Not Shown) CVS1B7980
14 Gasket, neoprene CVS1C128003012
*15 Filter Element Plain cellulose CVS1F257706992
16 Mounting Screw, SST (2 required) CVS1C276028992
17 Machine Screw, SST (6 required) CVS1B783928982
*18 Cap Screw, SST (4 required) CVS1K764724052
Hex head, steel, Cd pl CVS1D754828982
19 Pipe Plug (use only w/2-outlet body, not shown) Socket head, steel CVS1C333528992
0 to 30 psig CVS1J946099012
0 to 60 psig CVS1J975299012
0 to 100 psig CVS1J975399012
20 Pressure Gauge (not shown)
0 to 160 psig CVS1J975499012
* Recommended Spare Part

CVS Controls Ltd
Product Manual: CVS Type 67AFR Filter Regulator
Notes

CVS Controls Ltd
Product Manual: CVS Type 67AFR Filter Regulator
Notes

CVS Controls Ltd
Product Manual: CVS Type 67AFR Filter Regulator
Head Office
3900 – 101 Street
Edmonton, Alberta, Canada T6E 0A5
Office: [phone]
Fax: [phone]
Website: www.cvs-controls.com E-Mail: [email protected]
Printed in Canada Rev 0, 09/06
Calgary Sales Office
205, 2323 – 32 Avenue NE
Calgary, Alberta, Canada T2E 6Z3
Office: [phone]
Fax: [phone]

1
Head Office
3900 – 101 Street
Edmonton, Alberta, Canada T6E 0A5
Office: [phone]
Fax: [phone]
Website: www.cvs-controls.com E-Mail: [email protected]
CVS Type 630 HP
Regulators and
Relief Valves
Introduction
Please note: These regulators and relief valves must
be installed, operated and maintained in accordance
with CVS instructions and all applicable federal,
provincial, state and local codes, laws, rules, and
regulations.
The CVS 630 HP Series consists of a high pressure
reducing regulator, and Type CVS 630R relief valve.
These regulators and relief valves are furnished in
either spring-loaded or pressure-loaded construction
with 1 or 2 inch NPT screwed end connections.
Pressure loaded Type 630 HP regulators are
normally furnished without a main regulator spring
and use a Bellofram 7360 or a Bellofram P39
regulator.
Pressure loaded Type 630R relief valves are
furnished with a light rate relief valve spring and use
a Bellofram 7360 or a Bellofram P39 regulator.
Installation
After uncrating the regulator or relief valve, inspect it
for shipping damage. Be certain the body cavity and
seat ring are free from any foreign material. Also be
certain that connecting pipelines are free of loose
pipe scale.
The regulator or relief valve may be installed in any
position, but direction of flow through the body must
be as indicated by the flow direction arrow on
nameplate.
Instruction Manual
Figure 1: CVS Type 630HP Regulator
Calgary Sales Office
205, 2323 – 32 Avenue NE
Calgary, Alberta, Canada T2E 6Z3
Office: [phone]
Fax: [phone]
Note that in diagrams in this manual, regulator flow
direction is opposite relief valve flow direction.
Protect the regulator or relief valve against damage
from vehicles and other external sources. The
temperature capability of the 630 HP Series
regulator and relief valves with standard construction
materials is –20 to +150°F.

2
Vents
Spring-loaded constructions have a screened vent
assembly (Key 24) installed in the ¼” NPT spring
case vent opening. If a remote vent is required,
remove the vent assembly and install a remote vent
line.
Pressure loaded constructions have a bleed orifice
fitting (Key 38) installed in an extra outlet connection
of the loading regulator. The function of this fitting is
to bleed loading pressure during operation of the
regulator or relief valve.
Warning: The bleed orifice fitting
continuously vents a small amount of gas. If
the regulator or relief valve is located where
accumulation of the vented gas will create
an explosion hazard, install a remote vent
line to carry the vented gas to a safe area.
The bleed orifice is furnished with a ¼” NPT
screened opening; remove the screen and
install remote vent line.
All remote vent lines must have as large an inside
diameter as possible. The vent line should be as
short as possible with a minimum number of bends
and elbows. Protect all vent openings against
entrance of rain, snow or any other foreign material
that may plug the vent or affect operation of the
regulator or relief valve. Inspect all vent openings
periodically to be sure they are not plugged.
Overpressure Protection
As is the case with most regulators, the Type 630 HP
spring-loaded and pressure-loaded regulators have
outlet pressure ratings that are lower than the inlet
pressure ratings. Overpressure protection must be
provided if the actual inlet pressure can exceed the
outlet pressure rating. Overpressure protection may
also be required for the loading regulator and main
regulator spring case of pressure loaded regulators
and relief valves.
Refer to the following tables to determine pressure
ratings:
1. Spring loaded Type 630 HP regulators
1.1. Inlet pressure and pressure drop (Table 1)
1.2. Outlet pressure (Table 2)
2. Pressure loaded Type 630 HP regulators
2.1. Main regulator inlet pressure and pressure
drop (Table 1)
2.2. Loading pressure and outlet pressure
(Table 3)
3. Spring loaded Type 630R relief valve pressure
(Table 4)
4. Pressure loaded Type 630R relief valve
pressures (Table 5)
WARNING: Over pressuring any portion of this
equipment may cause damage to regular parts,
leaks in the regulator or personal injury due to
bursting of pressure-containing parts or
explosion of accumulated gas.
To prevent overpressure, provide an appropriate
overpressure protection device to ensure that none
of the limits listed in tables 1 through 5 will be
exceeded.
Regulator or relief valve operation below the limits
specified in tables 1 through 5 does not preclude the
possibility of damage from external sources or from
debris in the gas line. Inspect the regulator for
damage following any over pressuring condition.
Loading Regulator Supply Pressure
Use a clean, dry gas as supply pressure for the
loading regulator of pressure loaded regulators or
relief valves. Connect the supply to the ¼” NPT inlet
connection of the loading regulator. The supply
pressure may be obtained from the upstream piping,
but be certain adequate overpressure protection is
provided for the loading regulator and for the spring
case of the main regulator or relief valve.
Table 1: Maximum Inlet Pressures and Pressure Drops for CVS Type 630 HP Regulators
1/8” & 3/16”
Port Diameter 1/4” Port Diameter 3/8” Port Diameter 1/2” Port Diameter
Max. Allowable
Inlet Pressure, (PSIG) 1500+1500+1000+750+
Max. Allowable
Pressure Drop, ++ (PSIG) 1500 1000 500 250
Does not apply to loading regulator of pressure-loaded Type 630 HP.
+ Inlet pressure must not exceed the sum of the actual outlet pressure setting and the maximum allowable pressure drop. For example, with an outlet
pressure setting of 200 psig and a 3/8” port dia. (maximum allowable pressure drop of 500 psig), the maximum allowable inlet pressure is 700 psig.
++ Nitrile valve discs are normally furnished for pressure drops to 200 psi. For better erosion resistance, nylon valve discs are normally furnished for
higher-pressure drops.
Some erosion of valve discs occurs at all pressure drops due to solid particles in the flow stream. The rate of erosion is higher with large amounts of
impurities in the flow stream and with higher pressure drops. Valve discs and other regulator parts must be inspected periodically for erosion and
damage and must be replaced as necessary.

3
Table 2: Outlet Pressure Limits for Spring-Loaded CVS Type 630 HP Regulators
Low-Pressure Regulator High-Pressure Regulator
Outlet Pressure range 3 to 10
psig 8 to 20 psig 17 to 30 psig 27 to 40 psig 27 to 50 psig 46 to 95 psig 90 to 150 psig 150 to 200 psig 200 to 275 psig 275 to 500 psig
Spring Part Number CVS0W
0192
27022
CVS0W
0191
27022
CVS0W
0190
27022
CVS0Y
0664
000A2
CVS0W
0192
27022
CVS0W
0191
27022
CVS0W
0190
27022
CVS0Y
0664
000A2
CVS1J
1469
27142
CVS1K
3709
27082
Maximum Operating
Outlet Pressure, PSIG 10 20 30 40 50 95 150 200 275 500
Max. Outlet Pressure
Over Pressure Setting1,
PSIG 20 202Ltd. By
Max. emr
Outlet Pr. 200 2003
Max. Emergency
Outlet (Casing)
Pressure, PSIG 45 550
1. Damage to internal parts of the regulator may occur if outlet pressure exceeds the actual pressure setting by amounts greater than shown in this row.
2. For outlet pressure settings to 25 psig only. For pressure settings over 25 psig, outlet pressure is limited by max. emergency outlet pressure of 45 psig.
3. For outlet pressure settings to 350 psig only. For pressure settings over 350 psig, outlet pressure is limited by max. emergency outlet pressure of 550 psig.
4. Leakage or bursting of pressure-containing parts may occur if outlet pressure exceeds these values.
Table 3: Loading Pressure and Outlet Pressure Limits for Spring-Loaded CVS Type 630 HP
Regulators
Low-Pressure Regulator High-Pressure Regulator
Loading Regulator Type Bellofram 7360 Bellofram P39 Bellofram 7360 Bellofram P39
Max, Inlet Pressure
to loading regulator, psig 250 6000 250 6000
Outlet Pressure Ranges,2psig 0 to 30
0 to 60 0 to 225 0 to 120 50 to 225
200 to 500
Max. Operating Outlet
Pressure,2psig 60 100 500
Max. Main Regulator
Outlet Pressure Overpressure
Setting,3psig 204200 2005
Max. Emergency Outlet
(Casing) Pressure of Loading
Regulator,6psig 707110 550
Max. Emergency Outlet
(Casing) Pressure of Main
Regulator,6psig 70 600
1. Limited to this value by maximum inlet pressure to Type 630 HP
2. Applies to both loading regulator and main regulator.
3. Damage to internal parts of the regulator may occur if outlet pressure exceeds the actual pressure setting by amounts greater than those shown in this row. Loss of
loading pressure to main regulator diaphragm will reduce outlet pressure settings in proportion to the loss in loading pressure.
4. For pressure settings to 46 psig. For higher-pressure settings, outlet pressure is limited by max. emergency outlet pressure of 66 psig.
5. For pressure settings to 350 psig. For higher-pressure settings, outlet pressure is limited by max. emergency outlet pressure of 550 psig.
6. Leakage or bursting of pressure-containing parts may occur if outlet pressure exceeds these values.
7. Limited to this value by maximum emergency loading pressure of main regulator.
Table 4: Relief Valve Pressure Limits for Spring-Loaded CVS Type 630R Regulators
Low Pressure Relief Valve High Pressure Relief Valve
Max. Allowable
Inlet Pressure, psig Relief Pressure Setting Plus Maximum Allowable Buildup of 25 psig Relief Pressure Setting Plus Maximum Allowable Buildup of 250 psig
Max. Emergency
Inlet (Casing)
Pressure,*psig 75 550
Relief Pressure
Settings (psig) 3 to 8 6 to 17 15 to 22 20 to 35 27 to 50 30 to 70 50 to 95 75 to 175 150 to 250
Spring Part Number CVS0W 0192
27022
CVS0W
0191
27022
CVS0W
0190
27022
CVS0Y
0664
000A2
CVS1J
1469
27142
CVS0W
0191
27022
CVS0W
0190
27022
CVS0Y
0664
000A2
CVS1J
1469
27142
Leakage or bursting of pressure-contained parts may occur if inlet pressure exceeds these values

4
Table 5: Relief Valve Pressure Limits for Pressure-Loaded CVS Type 630R Regulators
Low Pressure Relief
Valve High Pressure Relief Valve
Loading Regulator Type Bellofram 7360 Bellowfram 7360 Bellofram P39
Max. Allowable Inlet Pressure to
Relief Valve, PSIG Relief pressure setting plus maximum Allowable buildup of 25 psig Relief pressure setting plus maximum Allowable buildup of 250 psig
Max. Emergency Inlet (Casing)
Pressure * of Relief Valve, PSIG 75 550 550
Max. Allowable Inlet Pressure to
Loading Regulator, PSIG 75+ 250 550+
Relief Pressure Settings, PSIG 10 to 20 or 20 to 50 50 to 100 100 to 225
Max. Emergency Outlet
(Casing) Pressure * of Loading
Regulator, PSIG 75++ 110 250
* Leakage or bursting of pressure-contained parts may occur if pressure exceeds these values.
+ Limited to this value by maximum emergency inlet pressure of relief valve.
++ Limited to this value by maximum emergency loading pressure of Type 630R
Putting Unit in Service
Use pressure gauges to monitor pressure during
startup.
1. For pressure loaded constructions, turn on
supply pressure to loading regulator.
2. Slowly open upstream shutoff valve.
3. Slowly open the downstream shutoff valve.
4. Check all connections for leaks.
5. If indicated by the monitoring pressure gauges,
make final spring adjustments per the
“Adjustment” section.
Adjustment
The range of allowable pressure settings is marked
on the nameplate. If a pressure setting beyond the
nameplate range is required, substitute an
appropriate spring in the relief valve or loading
regulator. Be sure to change the nameplate to
indicate the new pressure range.
Some pressure ratings are dependent upon the
actual outlet pressure settings being used. For
example, with a Type 630 HP regulator, outlet
pressure must not exceed the setting by more than
20 psig (200 psig for high-pressure constructions), or
damage to internal regulator parts may occur.
However, with some higher-pressure ranges, the
setting plus 20 psig (200 psig for high-pressure
constructions) exceeds the maximum emergency
outlet (casing) pressure. In these cases, outlet
pressure must be limited by the maximum
emergency outlet (casing) pressure. Before
increasing the setting, refer to table 2 through 5 (as
appropriate). Review the pressure limits for the
spring range being used, and be certain that the new
pressure setting will not result in an overpressure
condition. Always use a pressure gauge to monitor
pressure when making adjustments.
Spring Loaded Regulators and Relief
Valves
1. Loosen locknut (Key 22)
2. Rotate the adjusting screw (Key 23) clockwise
to increase the setting or counter clockwise to
decrease the setting.
3. Tighten locknut.
Pressure Loaded Regulators and Relief
Valves
1. Loosen the locknut found on the loading
regulator adjusting screw.
2. Rotate the loading regulator adjusting screw
clockwise to increase the setting or
counterclockwise to decrease the setting.
3. Tighten locknut.
Taking out of Service
Isolate the regulator or relief valve from all pressure.
For pressure loaded constructions, shut off supply
pressure to loading regulator.
Cautiously vent all pressure from the regulator or
relief valve before performing any service on the
unit.

5
Maintenance
WARNING: To avoid personal injury and
equipment damage, isolate the regulator or
relief valve from all pressure. Cautiously
release pressure from the regulator or relief
valve before attempting disassembly.
Due to normal wear that may occur in regulators and
relief valves, parts such as the valve disc, seat ring
and diaphragm must be inspected periodically and
replaced as necessary. The frequency of inspection
and replacement depends upon the severity of
service conditions or federal and provincial laws.
Normal wear of the seat ring and valve disc is
accelerated with high-pressure drops and with large
amounts of impurities in the flow stream.
Instructions are given below for replacing the seat
ring, valve disc and diaphragm. These instructions
may also be used for disassembly required for
inspection and replacement of other parts.
If the loading regulator of pressure-loaded
constructions requires maintenance, disconnect the
supply pressure line (and bleed orifice vent line if
one is present) and unscrew the loading regulator
from its mounting nipple. Refer to the separate
instruction manual for maintenance information.
Seat Ring and Valve Disc:
Note: With some piping systems it may be
possible to omit step 1 below by removing
four cap screws (Key 7) and spreading the
body (Key 1) and adaptor (Key 6) far
enough apart to allow removal of the seat
ring (Key 4) and Type 630 HP valve disc
(Key 3) or Type 630R valve seat O-ring
(Key 32). However, take care to avoid
pinching fingers between body and adapter.
1. Disconnect piping from Adapter (Key 6).
Remove four cap screws (Key 7) and adapter.
2. Remove seat ring (Key 4) and gaskets (Key 5).
3. To remove Type 630 HP valve disc (Key 3) OR
Type 630R valve seat O-ring (Key 32), first
disconnect remote vent pipe (if one is used).
For pressure loaded constructions, disconnect
loading regulator supply line.
4. Unscrew the two cap screws that secure
the diaphragm adaptor (Key 11) to body
(Key 1); remove diaphragm adaptor and
attach spring case (Key 21).
5. Remove valve carrier assembly (Key 2)
from body.
6. To replace seating surface:
6.1. For Type 630 HP, use a ¾” socket
wrench to remove and re-install valve
disc and holder assembly (Key 3).
6.2. For Type 630R, unscrew machine
screw (key31) and remove O-ring
washer and O-ring (Key 28 and 32)
from O-ring holder (Key 3). When
reassembling, apply a good quality
gasket shellac to the machine screw
thread.
7. Use new seat ring gaskets (Key 5) and
body gasket (Key 8) when reassembling.
Insert valve carrier assembly (Key 2) into
the body before re-installing the
diaphragm adaptor.
8. The spring case (Key 21) must point away from
the adaptor (Key 6) on Type 630 HP regulators.
On Type 630R relief valves, the spring case
must face the same direction as the adaptor
(Key 6). Be certain the lever (Key 10) engages
the valve carrier.
Diaphragm
1. Relieve spring compression as follows:
1.1 For spring loaded constructions, loosen
locknut (Key 22). Turn the adjusting screw
(Key 23) counterclockwise until spring
compression is relieved.
1.2 For pressure loaded Type 630R relief valves
(and for pressure loaded Type 630 HP
regulators that have been furnished with a
spring), turn cap screw (Key 23)
counterclockwise until spring compression is
relieved.
2. Disconnect remote vent line (if one is present).
3. For pressure loaded constructions, disconnect
the supply line from the loading regulator (Key
25).
4. Remove spring case (Key 21) by unscrewing
cap screws and nuts (Key 14).
5. Remove diaphragm (Key 13) and attached parts
from lever assembly (Key 10).
6. Unscrew cap screw (Key 18) from connector
head assembly (Key 12) and disassemble the
diaphragm assembly.
7. Install new diaphragm. Note that low-pressure
constructions use a diaphragm plate (Key 16)
on the spring case side of the diaphragm. Low
pressure, pressure loaded constructions use a
diaphragm plate on each side of the diaphragm
plate gasket (Key 33) with each plate. Install
new gaskets when replacing diaphragm.
8. When reassembling, be certain that the
diaphragm connector is engaged on the lever.

6
9. To ensure proper slack in the diaphragm:
9.1 For constructions using a spring, tighten the
spring case cap screws finger tight only.
Compress the spring slightly with the
adjusting screw (or cap screw for pressure
loaded constructions); then complete the
tightening of spring case cap screws and
nuts.
9.2 For constructions without a spring, tighten
spring case cap screws finger tight only.
Remove cap screw (Key 23). Insert a rod in
the spring case and push on the assembly to
take up the slack; then complete the
tightening of the spring case cap screws.
Re-install cap screw (Key 23) in spring case.
Nameplate Information
When corresponding with your CVS Controls
representative about this device, state the model
number, pressure range and all other pertinent
information found on the nameplate (Key 29).
When ordering replacement parts, also specify the
complete part number of each part required.

7
Parts Reference
Key Description
1 Body
2 Valve Carrier
Type 630R O-Ring Holder
3* Type 630* Valve Disc Assembly
4 Seat Ring
5 Gasket (2 required)
6 Inlet Adaptor, Steel
7 Cap Screw, Steel (4 required)
8* Gasket
9 Pin, SST
10 Lever Assembly
11 Diaphragm Adaptor
12 Connector Head Assembly
13* Diaphragm, Neoprene
14 Cap Screw, Steel
15 Cap Screw, Steel
16 Diaphragm Plate, Steel Cd. Pl.
17 Lower Spring Seat
18 Cap Screw, Steel Pl.
19 Spring
20 Upper Seat Ring, Zinc
21 Spring Case
22 Hex Nut, Steel Cd. Pl
23 Adjusting Screw, Steel
24 Vent Assembly (Spring Loaded
Only)
25 Loading (Pressure Loaded Only)
26 Hex Nut, Steel Cd. Pl.
27 Cap Screw, Steel Pl.
28 O-Ring Washer (Pressure Loaded
Only)
29 Nameplate
30 Drive Screw, SST
31 Machine Screw (CVS Type 630R
Only)
32 O-Ring
33 Head Gasket (Pressure Loaded
Only)
34 Gasket (Pressure Loaded Only)
35 Gasket (Pressure Loaded Only)
36 Pipe Nipple (Pressure Loaded Only)
37 Street Elbow
38 Bleed Orifice Assembly (Pressure
Loaded Only)
Figure 1: Spring-Loaded CVS Type 630R
Relief Valve
High Pressure Connection
Figure 2: Pressure-Loaded CVS Type 630
Regulator
High Pressure Connection

8
Figure 3: Spring-Loaded CVS Type 630R Relief Valve
Low Pressure Connection
Figure 4: Pressure-Loaded CVS Type 630R Relief Valve
Low Pressure Connection

9
Figure 5: Pressure-Loaded CVS Type 630 Regulator
Low Pressure Connection

10
CVS Type 630 HP Regulators and Relief Valves
Parts List
Key
No. Description Part #
1” Cast Iron w/ brass pitot tube CVS0W0209000A2
1” Cast Iron w/ SST pitot tube CVS0W0209X0012
1” Steel w/ brass pitot tube CVS2N6990000A2
1” Steel w/ SST pitot tube CVS2N6990X0012
2” Cast Iron w/brass pitot tube CVS0W021519012
1 Body
2” Steel w/ SST pitot tube CVS2N699122012
Brass CVS0W018614022
2 Valve Carrier SST CVS0W018635032
Brass CVS1D336014012
O-Ring Holder, Type 630R SST CVS1D336035032
Brass/Nitrile CVS1B4500000A2
SST/Nitrile CVS1B4500000B2
Brass/Nylon CVS1C1860000A2
SST/Nylon CVS1C1860000B2
Brass/TFE CVS1C1860000C2
3 Valve Disc Assembly, Type 630
SST/TFE CVS1C1860000D2
1/8” Port CVS0Z040014012
3/16” Port CVS1B219514102
1/4” Port CVS0W018314012
3/8” Port CVS0W018214012
Brass
1/2” Port CVS0W018114012
1/8” Port CVS1K416635032
3/16” Port CVS1K416535032
1/4” Port CVS1K416435032
3/8” Port CVS1K416335032
Seat Ring, Type 630
SST
1/2” Port CVS1K416235032
Brass 1/2” Port CVS1B735014012
4
Seat Ring, Type 630R SST 1/2” Port CVS1B735035032
Copper, For Brass Trim CVS0W018415042
5 Gasket (2 Req’d) Garlock CVS0W018404022
1-inch Body CVS1F479823022
6 Inlet Adaptor, Steel 2-inch Body CVS1F479923022
1-inch Body CVS1A935924052
7 Cap Screw, Steel (4 Req’d) 2-inch Body CVS1A353524052
8 Gasket, Asbestos CVS0W018704022
9 Pin, SST CVS0W018835072
Low-Pressure CVS1B2891000A2
10 Lever Assembly High-Pressure CVS1B2890000A2
Cast Iron CVS0W019719012
Low-Pressure Steel CVS2N698522012
Cast Iron CVS0W019819012
11 Diaphragm Actuator High-Pressure Steel CVS2N698722012
Brass CVS1C3000X0012
Low-Pressure SST CVS1C3000X0022
Brass CVS1P8465000A2
12 Connector Head Assembly High-Pressure SST CVS1P8465000B2
Low-Pressure CVS0W020002192
13 Diaphragm, Neoprene High-Pressure CVS0W019902192
Low-Pressure (10 Req’d) CVS1A352524052
14 Cap Screw, Steel High-Pressure (4 Req’d) CVS1A352524052
Standard (2 Req’d) CVS1A352624052
CVS1R419124052
15 Cap Screw, Steel Wire Seal (1 of Each Req’d) CVS1A352624052
630 and 630R, Low-Pressure, Pressure-Loaded CVS1B136324052
16 Diaphragm Plate, Steel Cd. Pl. All Others CVS1A352524052
Low-Pressure, Steel CVS0W020324102
Pressure Range to 275 CVS0W020144022
17 Lower Spring Seat High-Pressure, Zinc Pressure Range over
275 CVS1K371044022
630 and 630R, Low-Pressure, Pressure-Loaded CVS1B136324052
18 Cap Screw, Steel Pl. All Others CVS1R817699012

11
CVS Type 630 HP Regulators and Relief Valves
Parts List cont’d
Key
No. Description Part #
19 Spring See Following Table
630 Pressure Loaded None Required
Pressure Range to 275 CVS0W019344022
20 Upper Spring Seat, Zinc 630 and 630R, and 630R
Pressure-Loaded Pressure Range over
275 CVS1K371144022
Cast Iron CVS3C780919042
Low Pressure Steel CVS3N698122012
Cast Iron CVS3C780819042
21 Spring Case High Pressure Steel CVS3N698322012
22 Hex Nut, Steel Cd. Pl. CVS1A352424122
23 Adjusting Screw, Steel See Following Table
24 Vent Assembly (Not Required for Pressure-Loaded Units) CVSEMY602X1A12
25 Loading Regulator (For Pressure-Loaded Only) Type 67, 67H, 1301F
or 1301G
Low-Pressure (10 Req’d) CVS1A352724122
26 Hex Nut, Steel Cd. Pl. High-Pressure (4 Req’d) CVS1A352724122
27 Cap Screw, Steel Pl. (2 Req’d) (Not Shown) CVS1A341827052
Brass CVS1D335914012
28 O-Ring Washer
(For Pressure-Loaded Units Only) SST CVS1D335935072
Type 630 CVS1F749611032
29 Nameplate, Aluminum Type 630R CVS21A5495X012
30 Drive Screw, SST (4 Req’d) CVS1A368228982
Brass CVS1A682618992
31 Machine Screw, Type 630R Only SST CVS1D336435042
Nitrile CVS1D288806992
32 O-Ring TFE CVS1F581906522
33 Head Gasket, Garlock (2 Req’d), (For Pressure-Loaded Units Only) CVS1B192204022
34 Gasket, Copper (For Pressure-Loaded Units Only) CVS0Y008915042
35 Gasket, Copper and Garlock (For Pressure-Loaded Units Only) CVS1E275999212
36 Pipe Nipple, Steel Galvanize Zn Pl (Pressure-Loaded Units Only) CVS1B218826232
37 Street Elbow, Malleable Iron (High-Pressure, Pressure-Loaded Units) CVS1A913221992
3-20 psig Loading
Regulator Range CVS1K8845X0012
Low
Pressure 20-100 psig Loading
Regulator Range CVS1K8844X0012
38 Bleed Orifice Assembly
(Pressure-Loaded Only)
High-Pressure CVS1K8843X0012

12
Rev 0 03/05
Printed in Canada
Key 23: Adjusting Screw, Steel
Type Spring Use
Adjusting Screw
For Wire Seal,
Use Adjusting
Screw
CVS0W019227022 CVS1A279128982 CVS1R829928992
CVS0W019127022 CVS1B212028982 CVS1R830028992
CVS0W019027022 CVS1A500528982 CVS1R808528992
CVS0Y0664000A2 CVS1A500528982 CVS1R808528992
CVS1J146927142 CVS1A500528982 CVS1R808528992
CVS1K370927082 CVS1A500528982 CVS1R808528992
CVS 630
None * CVS1C116227092 ---
CVS0W019227022 CVS1A279128982 CVS1R829928992
CVS0W019127022 CVS1B212028982 CVS1R830028992
CVS0W019027022 CVS1A500528982 CVS1R808528992
CVS0Y0664000A2 CVS1D336628982 CVS1R830128992
CVS1J146927142 CVS1D336628982 CVS1R830128992
CVS 630R
CVS0W019227022* CVS1E359024492 ---
* Pressure-Loaded Construction
Key 19: Regulator Spring, Steel
Type Outlet (or Relief)
Pressure Setting,
PSIG
Spring Part
Number Spring Colour Code
3 to 10 CVS0W019227022 Red Stripe
8 to 20 CVS0W019127022 Olive Drab
17 to 30 CVS0W019027022 Cadmium
Low-Pressure
27 to 40 CVS0Y0664000A2 Green Stripe
27 to 50 CVS0W019227022 Red Stripe
46 to 95 CVS0W019127022 Olive Drab
90 to 150 CVS0W019027022 Cadmium
150 to 200 CVS0Y0664000A2 Green Stripe
200 to 275 CVS1J1469270142 Blue Stripe
Spring-Loaded Type
630
High-Pressure
275-500 CVS1K370927082 Yellow Stripe
3 to 8 CVS 0W019227022 Red Stripe
6 to 17 CVS0W019127022 Olive Stripe
15 to 22 CVS0W019027022 Cadmium
20 to 35 CVS0Y0664000A2 Green Stripe
Low-Pressure
27 to 50 CVS1J146927142 Blue Stripe
30 to 70 CVS0W019127022 Olive Drab
50 to 95 CVS0W019027022 Cadmium
75 to 175 CVS0Y0664000A2 Green Stripe
Spring-Loaded Type
630R
High-Pressure
150 to 250 CVS1J146927142 Blue Stripe
Low-Pressure 10 to 20 or
20 to 50 CVS0W019227022 Red Stripe
Pressure-Loaded
Type 630 R High-Pressure 50 to 100 or
100 to 225 CVS0W019227022 Red Stripe