All Zeagle Diaphragm Regulator Models share the same internal components. The differences between diaphragm models are in the hose orientation, environmental sealing, cold water features, second stage controls, and flow patterns within the first stage housing. The ReZort and RaZor are both Flow-by Piston Regulators that also share internal parts between them.  The RaZor combines Valve and Regulator components into one body.

 
FIRST STAGE 
SPECIFICATIONS 
ZX-Flathead VI

Flathead-XP

ZX-50D ZX-DSV Envoy Deluxe Envoy ReZort RaZor
Type:  Balanced Diaphragm

Balanced  Diaphragm

Balanced Diaphragm Balanced Diaphragm Balanced Diaphragm Balanced Diaphragm Flow-by Piston Flow-by Piston, Valve/Regulator Combination
# of Low Pressure 
Ports: 
4

4

4 5 5 5 4 4
# of High Pressure 
Ports: 
2

2

2 2 2 2 2 1
Swivel Hose 
Mount? 
NO

NO

YES NO NO NO NO NO
Environmental 
seal: 
YES

NO

YES YES NO NO NO NO
Nitrox Ready?  YES- to 40% O2

YES- to 40% O2

YES- to 40% O2 YES- to 40% O2 YES- to 40% O2 YES- to 40% O2 YES- to 40% O2 YES- to 40% O2
Supplied Tank 
Connection: 
Yoke or DIN with Yoke Adapter

Yoke or DIN with Yoke Adapter

Yoke or DIN with Yoke Adapter Yoke or DIN with Yoke Adapter Yoke or DIN with Yoke Adapter Yoke or DIN with Yoke Adapter Yoke or DIN with Yoke Adapter Screws Directly into Standard Scuba Cyl.
SECOND STAGE 
SPECIFICATIONS 
ZX-Flathead VI Flathead XP ZX-50D ZX-DSV Envoy Deluxe Envoy ReZort RaZor
Type:  Pneumatically
Balanced

Pneumatically
Balanced

Pneumatically
Balanced
Pneumatically
Balanced
Pneumatically
Balanced
Pneumatically
Balanced
Pneumatically
Balanced
Pneumatically
Balanced
Model:  ZX

XP

ZX ZX Envoy Envoy Envoy Envoy
Venturi Vane 
Assistance? 
YES

YES

YES YES YES YES YES YES
Diver Adjustable 
Freeflow Control? 
Freeflow Control Lever

Freeflow Control Lever

Freeflow Control Lever Freeflow Control Lever Freeflow Control Lever Freeflow Control Lever Freeflow Control Lever Freeflow Control Lever
Diver Adjustable 
Breathing Control? 
Adjustable Control Knob

Adjustable Control Knob

Adjustable Control Knob Adjustable Control Knob Adjustable Control Knob NO NO NO
Anti-Freeze 
Heat Exchanger? 
YES

NO

YES YES NO NO NO NO