Apex Engineering

AIR REGULATOR - PD Series Uflow Automation
*Supply Pressure 7 bar, pressure drop Δp = 0.5bar (For Standard Models)
Features
 Confonns to ISO 6953 - 1
 Suitable for panel and modular mountings
 Nonraising 'Push To Lock' Adjusting Knob For
Locking At Any Set Pressure
 Diaphragm operated, relieving type
 Pressure Compensated By Balanced Poppet
Precautions
 Note the direction of flow before installation and connect piping accordingly.
 Flush pipings for dirt, dust, rust and other foreign particles.
 Install in clean atmosphere.
Specifications
Model No.:
Pressure Gauge Port Size:
Maximum Supply Pressure:
Regulating Pressure Range:
Media Temperature:
PD-R1
15 Bar
0.2- 2, 0.2 -4, 0.5-7, 0.5-12
G¹⁄₈
Installation:
Materials of construction:
Optional accessories:
Media :
Port Size:
Compressed air - Filtered
PD-R7
G¼ G³⁄₈
G¹⁄₈
Any Position
Aluminium, Brass, Steel, Acetal, SS, Nitrile
Clamp, Modular mounting kit, Pressure Gauge
Flow Rate LPM*: 600 2500
+5°C to +50°C
Ambient Temperature: -10°C to +60°C
Technical Data
Model No. A
PD-R7 1.2 "
PD-R1 1.2 ¼" 40 81 13
Diagram No. V B E F J K T
30 28 45 5.5 2
ØG L
25 30.5
W ØM
¹⁄₈”
¹⁄₈”
 Good Flow And Regulating Characteristics
Pressure Setting
Pull the knob and adjust by turning the knob clockwise to increase the pressure. Push the knob back to its locked
position. (Turning the knob counter clockwise will reduce the pressure)
Diagram No. : 1.2
Symbol
PD-R2 PD-R3 PD-R4
G½
G¹⁄₈
4000
G¾
G¼
5000
G1
G¼
6000
PD-R3 1.2 " 90 177 48
PD-R2 1.2 "
55 135 40
70
40
66
40
65
53
11
6.5
5
40 2
53
43
¹⁄₈”
” 51
PD-R4

�� Product Overview

The Uflow PD‑R Series Air Regulator is a precision, diaphragm-operated pressure regulator designed to deliver reliable, adjustable control of compressed air systems. It ensures clean, stable delivery pressure suitable for industrial and pneumatic applications.

⚙️ Technical Specifications
�� Key Features & Benefits

• ISO 6953‑1 Compliant – Ensures quality and reliable performance

• Diaphragm-Operated, Relieving Type – Maintains downstream pressure by venting excess safely 

• Balanced Poppet Compensation – Provides stable output even with fluctuating input pressure 

• “Push-to-Lock” Knob – Prevents unintended pressure changes 

• High Flow Capability – Supports system demands with minimal pressure 

• Modular & Accessible – Compatible with clamp or panel mount for flexibility

�� Operating Instructions & Precautions

Installation Tips:

• Observe flow direction to avoid 

• Clean pipelines before installation to prevent 

• Use correct fittings: tapered threads with Teflon tape; straight threads with sealing 

Setting Pressure:

1. Pull the knob to unlock.

2. Turn clockwise to raise pressure; counterclockwise to lower.

✅ Ideal Use-Cases

• Pneumatic systems needing precise downstream pressure control

• Panel-mounted or modular air treatment setups (FRL units)

• Manufacturing, packaging, automotive paint booths, air-tools

• Any filtered air network requiring stable, repeatable pressure output

�� Summary

The Uflow PD‑R Air Regulator stands out with its ISO-compliant build, durable materials, wide port and pressure options, and modular install flexibility. It’s a trusted solution for applications demanding clean, controlled, and stable compressed air delivery.

FILTER REGULATOR COMBINATION - PD Series Uflow Automation
*Supply Pressure 7 bar, pressure drop Δp = 0.5bar (For Standard Models)
Specifications
Model No.:
Pressure Gauge Port Size:
Maximum Supply Pressure:
Regulating Pressure Range:
Medium Temperature:
PD-FR1
10 Bar
0.2- 2, 0.2- 4, 0.5- 7, 0.5- 10 (Standard)
G¹⁄₈
Installation:
Materials of construction:
Optional accessories:
Media :
Port Size:
Compressed Air
PD-FR7
G¼ G³⁄₈
G¹⁄₈
Vertical
Aluminium, Brass, Steel, Acetal, SS, Nitrile
Clamp, Modular mounting kit, Pressure Gauge
Flow Rate LPM*: 500 1800
+5°C to +50°C
Filteration (μm) 1, 5, 25, 40 (Standard), 50, 100
Technical Data
Model No. A
PD-FR7 1.4 " 55 220 95
PD-FR1 1.4 ¼" 40 165 64
Diagram No. V B E F J K T
40
30
40
28
53
45
6.5
5.5
2
2
ØG L
25
W
¹⁄₈”
¹⁄₈” 40
Symbol
PD-FR2 PD-FR3 PD-FR4
G½
G¹⁄₈
3000
G¾
G¼
4250
G1
G¼
5500
Bowl Capacity (ml)
(at maximum condensate level)
Bowl Material Polycarbonate
9 32 44 165 165
PD-FR3 1.4 " 90 370 130
PD-FR2 1.4 " 70 287 134
70
50
66
55
65
62
11
8.5
5
¹⁄₈” 47 2
51
U
M5
M5
M5
M5
Diagram No. : 1.4
PD-FR4 1.4 1" 90 370 130 70 51 66 65 11 5 M5
Features
 Modular type
 Suitable for panel mounting
 Filter Bronze filtering element
Separator and shield for efficient moisture
separation
 Regulator Diaphragm operated, relieving type
Pressure compensated by balanced poppet
 Good flow and regulating characteristics
Precautions
 Note the direction of flow before installation and connect piping accordingly.
 Flush pipings for dirt, dust, rust and other foreign particles.
 Install in clean atmosphere.
Pressure Setting
Pull the knob and adjust by turning the knob clockwise to increase the pressure. Push the knob back to its locked
position. (Turning the knob counter clockwise will reduce the pressure)


The Uflow PD‑R Series Air Regulator is a precision, diaphragm-operated pressure regulator designed to deliver reliable, adjustable control of compressed air systems. It ensures clean, stable delivery pressure suitable for industrial and pneumatic applications.