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687 Technology Way

Napa, CA 94558

Phone: (707) 259-0102

FAX: (707) 259-0117

www.aptech-online.com

Operation Manual

Piston Sensed Gas Pressure Regulators

(Models KT10, Welded KT10, KT12)

Table of Contents:

A. General information ...................................................................................................................... 1

B. System Design/Product Selection ................................................................................................. 1

C. Installation..................................................................................................................................... 1

D. Manually Adjustable, Non-relieving (non-venting) Regulator Operation .................................... 4

E. Manually Adjustable, Self-relieving (self-venting) Regulator Operation .................................... 5

F. Preset Regulator Operation ........................................................................................................... 6

G. Pneumatically Actuated, Non-relieving (non-venting) Regulator Operation ............................... 7

A. General information

AP Tech pressure regulators are used in gas delivery systems to reduce the source pressure to a

lower delivery (outlet) pressure. This operation manual is applicable to gas pressure regulators that

use a piston to sense the delivery pressure.

Refer to the appropriate catalog data sheet for specific product information. For special options that

are not shown in the data sheet, contact the factory or your local representative for questions on

proper operation.

B. System Design/Product Selection

1. AP Tech piston sensed gas pressure regulators are not safety accessories per EU Pressure

Equipment Directive 97/23/EC or safety related devices per EU ATEX Directive 94/9/EC. The

EU Pressure Equipment Directive requires the system designer to install a safety accessory (for

example, safety relief valve or burst disc) where the design pressure of the downstream system is

lower than the upstream pressure.

2. When selecting the pressure regulator model and configuration, verify the following information.

a. Verify the materials of construction are compatible with the intended process gas.

b. Verify the pressure and temperature ratings are acceptable for the intended application.

c. If the regulator is to be equipped with either a supply or delivery pressure gauge, verify that

the pressure gauge range is suitable for the application.

d. Verify that the flow capability of the regulator is appropriate for the application.

3. KT10, Welded KT10, and KT12 regulators must be ordered with the non-relieving (non-venting)

option if the process gas they are to be used with is hazardous (flammable, toxic, etc.). The

self-relieving (venting) option on these models vents process gas through the regulator cap

directly into the atmosphere surrounding the regulator, which is undesireable with a hazardous

gas.

4. Pressure regulators can be used under a large variety of operation conditions. The system

designers shall decide product selection based upon their own analysis and testing to verify

acceptable operation with specific equipment.

C. Installation

1. Verify the pressure rating is acceptable for the intended application.

2. If the regulator is equipped with either a supply or delivery pressure gauge, verify that the

pressure gauge range is suitable for the application.

Page 1 of 9 Manual 15000011 Rev. 5

Summary of content (9 pages)

PAGE 1
687 Technology Way Napa, CA 94558 Phone: (707) 259-0102 FAX: (707) 259-0117 www.aptech-online.com Operation Manual Piston Sensed Gas Pressure Regulators (Models KT10, Welded KT10, KT12) Table of Contents: A. B. C. D. E. F. G. General information ...................................................................................................................... 1 System Design/Product Selection .................................................................................................
PAGE 2
Operation Manual Piston Sensed Pressure Regulators 3. Inspect the regulator to determine the flow path through the regulator and how the regulator will need to be installed in the system. a. The high pressure (inlet/supply) port(s) is labeled with an “HP” marked on the body near the port. Arrows are sometimes used next to the HP characters to point toward a high pressure port. b. The low pressure (outlet/delivery) port(s) is labeled with an “LP” marked on the body near the port.
PAGE 3
Operation Manual Piston Sensed Pressure Regulators Figure 1. KT Adjustable and Preset Regulator ______________________________________________________________________________________________________________________ Figure 2. KT Panel Mount Clamp Detail Page 3 of 9 Manual 15000011 Rev.
PAGE 4
Operation Manual Piston Sensed Pressure Regulators Figure 3. Pneumatically actuated KT10 and KT12 regulator dimensions. Page 4 of 9 Manual 15000011 Rev.
PAGE 5
Operation Manual Piston Sensed Pressure Regulators D. Manually Adjustable, Non-relieving (non-venting) Regulator Operation Note: A pressure regulator should not be used as a positive shut-off device. Caution: Do not pressurize the regulator low pressure port, except by rotating the adjustment wheel clockwise (increasing the set point), as damage to the regulator internal parts or leakage may result. 1. Perform the following to increase the regulator delivery pressure set point. a.
PAGE 6
Operation Manual Piston Sensed Pressure Regulators  1. 2. 3. 4. Audible venting is detected inside the regulator bonnet while increasing the delivery pressure of the regulator by rotating the adjustment wheel clockwise. Perform the following to increase the regulator delivery pressure set point. a. Before opening the source valve, verify that the regulator adjustment wheel is turned fully counterclockwise (fully decreased position). b.
PAGE 7
Operation Manual Piston Sensed Pressure Regulators g. Using 3/8 inch wrench on stem flats, turn stem clockwise to increase the delivery pressure to the desired pressure. Note: The delivery pressure will decrease as the flow rate is increased. It may be advantageous to compensate by adjusting the regulator to the desired delivery pressure while operating at the desired flow conditions. Be aware the delivery pressure will rise if the flow is shut-off or decreased downstream. h.
PAGE 8
Operation Manual Piston Sensed Pressure Regulators Table 1. AP Tech piston regulator supply pressure effect values. Model Supply Pressure Effect (Increase in delivery pressure for every 100 psi decrease in source pressure) Standard KT10: KT10F KT10H KT10J KT10L KT10N KT10P KT10R High Flow KT10: KT10F HF KT10H HF KT10J HF KT10L HF KT10N HF KT10P HF Standard KT12: KT12E KT12G KT12I KT12J KT12L High Flow KT12: KT12E HF KT12G HF KT12I HF KT12J HF KT12L HF 0.7 psi 0.7 psi 1.3 psi 2.9 psi 2.9 psi 5.1 psi 5.
PAGE 9
Delivery Pressure (psig) 0.00 Piston Sensed Pressure Regulators 0.69 1.38 Actuation Control Pressure (bar) 2.07 2.76 3.45 4.14 4.83 5.52 10000 690 9000 621 8000 552 KT10R * KT10N KT10J KT10H 7000 6000 483 414 5000 345 4000 276 3000 207 2000 138 1000 69 0 Delivery Pressue (bar) Operation Manual 0 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 Actuation Control Pressure (psig) Figure 4. Pneumatically actuated KT10 delivery pressure vs. actuation control pressure.