Parker Instrumentation Training

Question 1

What are the pressure ratings of Parker’s stainless steel C-Series check valves?

Answer 1

6,000 psi 1/8”-3/4”

5,000 1”

Question 2

Why use instrumentation grade valves (6 reasons)

Answer 2

size, pressure, end connection, cleaning, cleaning, leak integrity, complimentary products/portfolio

Question 3

When considering a selector or diverter valve, what inlet must we derate the pressure rating.

Answer 3

side port, not the bottom port

Question 4

What is the pressure rating for the HB Series Ball Valves?

Answer 4

10,000 with PEEK seats and 6,000 with PCTFE seats

Question 5

What are the three stem types for Parker’s needle valves?

Answer 5

R is on/off
K is on/off but has a soft tip which is good for gas applications
N is regulation

Question 6

Can you use a rotary plug valve in throttling applications?

Answer 6

Yes

Question 7

What application is a CB Series check valve designed for?

Answer 7

reducing maintenance and performance requirements for dual fuel turbines.

Question 8

What are the major differences between the C-series and CO-series check valve?

Answer 8

C series is general use
CO series is good for R&D and micro electronics, essentially applications requiring high integrity leak protection, it carries the only published leak rate of 4x10-9 CC/SEC (with viton seals, standard cubic centimeters per second)

Question 9

Are metering valves designed for on/off applications?

Answer 9

No, the stem will be damaged if bottomed out.

Question 10

Does Parker offer repair kits for their metering valves?

Answer 10

No, the disassembly process is not field friendly, components can be damaged beyond useable condition.

Question 11

Questions to ask when specing a valve?

Answer 11

temperature, end connection size, end connection type, what media, pressure, service, manual or actuated, area classifications.

Question 12

Features of B-Series ball valve?

Answer 12

packing allows for easy inline adjustment, free floating ball design allows for seat wear compensation, microfinished ball ensures leak tight shutoff, applications up to 6,000 psi

Question 13

What is the pressure rating of a B-Series ball valve with PTFE Seats?

Answer 13

1,500 psi

Question 14

Features of the MB Series Ball valve?

Answer 14

packing nut allows for easy inline maintenance, competes with Swagelok 40 series (millions of installations worldwide), single piece molded PFA packing encapsulates the ball eliminating entrapment areas, applications up to 3,000 psi.

Question 15

Why would someone use the U-Series Needle Valve?

Answer 15

dust seal in the bonnet, use in applications up to 6,000 psi and temps as high as 1,200F with grafoil packing, packing below the threads, it’s meant for severe service applications, non-rotating stem increases service life.

Question 16

What is the purpose of packing below the threads (PBT)?

Answer 16

packing below the threads protects thread lubricants from media, helping prevent galling

Question 17

Why use a CPI Instrumentation fitting?

Answer 17

easier to install, moly thread lubricant, 3-piece design, suparcase ferrule, tremendous value/performance with scratched tubing, dam of material builds to prevent tube blow out during pressure, seal on tube in front great for high vibration and thermal cycling applications

Question 18

What are the 3 bonnet designs for needle valves?

Answer 18

integral (1-piece), screwed (bonnet screwed in to the body), union (bonnet sit in top of valve body nut torques bonnet into valve, making it very secure).

Question 19

3 flow patterns of needle valves

Answer 19

globe, straight through, and angle

Question 20

What type of Parker valves would you use for throttling applications?

Answer 20

needle and plug

Question 21

Purpose of relief valve?

Answer 21

when upstream pressure exceeds the closing force exerted by the spring the lower stem opens permitting flow through the valve.

Question 22

Plug valve versus ball valve

Answer 22

Plug is economical, compact, throttling, higher Cv value

Ball offers bi-directional flow, higher operating pressures and cylce life, 3-way options

Question 23

When was CPI and A-Lok developed and released?

Answer 23

A-Lok: Developed in ‘82 | Released in ‘85

CPI: Developed in 66’ | released in 68’

Question 24

5 reasons to use Tubing over pipe

Answer 24

simple, fewer fittings, less leak paths, less pressure drop, economy of space and weight

Question 25

Why did Parker come out with Suparcase hardening?

Answer 25

to help ensure the ferrule was hard enough to seal on the tube for gas applications.

Question 26

In addition to hardening, how does Suparcase help?

Answer 26

increases corrosion resistance of ASTM type 316 stainless steel, it’s proprietary to Parker Hannifin

Question 27

Where is the sealing on both CPI and A-Lok?

Answer 27

CPI the sealing is in the front of the assembly

A-Lok is in the back with the rear ferrule

Question 28

What applications would benefit from using CPI versus Alok?

Answer 28

high vibration, gas sealing, and thermal cycling applications, the unique bowing action of the single ferrule acts as a dampener against the tube seal helping with high vibration stress.

Question 29

Why does the ferrule need to be harder than the tube?

Answer 29

in order to create a good seal, the ferrule must grip the tubing, so if the ferrule is softer or equal to the tubing , the ferrule will not create a leak tight seal.

Question 30

What are three reasons why a customer may find CPI useful compared to ALOK?

Answer 30

safety (reduced chance of error in assembly), fewer components to stock (1 ferrule versus 2 ferrules), sealing point moved to front so performs better in thermal cycling, gas sealing, and high vibration applications.

Question 31

why is it important to understand temperature deration of tubing?

Answer 31

as temperature increases, the integrity of pressure performance diminishes increasing the potential of blowout if spec’d incorrectly.

Question 32

why is it vitally important to ensure the tubing has bottomed out against the fitting body?

Answer 32

to ensure there’s no leak path.

Question 33

When reviewing the tubing pressure versus wall thickness guide, what does the white and gray shaded area represent?

Answer 33

white is acceptable for gas service

gray is unacceptable for gas service

Question 34

once a fitting assembly has been assembled to finger tight, what is the protocols for various sizes to ensure proper assembly?

Answer 34

1/16-3/16 should be tightened 3/4 turn beyond finger tight

1/4” - 1” should be tightened 1-1/4 turn beyond finger tight

Question 35

when using a gap gauge, what should you know?

Answer 35

if the gauge does NOT fit between the nut and body, the fitting has been properly tightened. If the gauge fits between the nut and body, additional tightening is required.

Question 36

can you use a gap gauge for remakes?

Answer 36

No

Question 37

why would you use a port connector?

Answer 37

to close couple two fittings instead of measuring and cutting a small length of tubing

Question 38

for port connectors, how many turns beyond finger tight for proper assembly?

Answer 38

1/4 turn

Question 39

Why use a plug fitting?

Answer 39

to plug the unused port on a fitting

Question 40

For plugs, how many turns beyond finger tight for proper assembly?

Answer 40

1/4 turn

Question 41

For remakes, how many turns should you go beyond original position?

Answer 41

1/2 a hex flat

Question 42

what are three main reasons fittings could leak?

Answer 42

under tightening, improper tube insertion, damage to tubing.