Description
NAI-LOK PMF Semi-Automatic Changeover System
Description & Operating Principle
Description: The PMF series is a continuous gas distribution system for high-purity services, typically used in laboratories or factories. This system changes the gas supply or prioritizes the cylinder from a primary source to a reserve source without interrupting the pressure delivered to the usage pipeline.
Operating Principle: The semi-automatic panel handles two cylinders (or cylinder banks) at once. When the pressure in the active cylinder drops below a preset level, a semi-automatic switch is activated to change over to the full cylinder. This changes the regulator pressure on the primary side without interrupting the gas flow, thereby switching the gas supply to the new primary side.
Key Features
- Single-stage pressure reduction design.
- Suitable for pure, inert, reactive, flammable, and oxidizing gases as well as gas mixtures.
- Uninterrupted gas flow with the semi-automatic changeover system.
- Can be upgraded to manage up to 2×4 gas cylinders.
Applications
- Research with pure or corrosive gases.
- Supplying hydrogen and other flammable gases to laboratories.
- Central gas supply systems for laboratories or factories.
Specifications (PMF Series)
| Parameter | Details |
|---|---|
| Body Material | 316 Stainless Steel (with ball valve) |
| Inlet Pressure | Max 300 bar |
| Set Outlet Pressure | 200 psig (13.8 bar) |
| Diaphragm Material (Regulator) | 316 Stainless Steel (standard) |
| Operating Temperature | -40°F to 165°F (-40°C to 74°C) |
| Leakage | Internal: Bubble-tight External: Design meets ≤2×10⁻⁸ atm cc/sec He |
| Dimensions (W x H x D) | 450 x 54 x 153 mm |
| Weight | 6.0 KG |
| Inlet / Outlet Ports | 1/4″ FNPT |
| Options | Relief valve, flexible hose, tube fitting |
Specifications (Pigtail)
| Parameter | Details |
|---|---|
| Material | 316 Stainless Steel |
| Maximum Working Pressure | 3500 psi / 241 bar |
| Swivel Nut | M14x1.5 or NPT 1/4″M |
| Cylinder Connection | CGA/BS/DIN |
Product Code Configuration Guide (PMF Series)
| Basic Series | Body Material | Inlet Pressure | Outlet Pressure | Inlet Connection | Outlet Connection | Relief Valve | Isolation Valve |
|---|---|---|---|---|---|---|---|
| PMF | S – 316 Stainless Steel | 40 – 4000 psig (276 bar) (Ball Valve) 29 – 2900 psig (200 bar) (Diaphragm Valve) |
20 – 20-200 psig (13.8 bar) | 4F – 1/4″ NPTF 4N – 1/4″ OD |
4F – 1/4″ NPTF 4N – 1/4″ OD |
0 – Without valve W – With valve |
BV – 4000psig Ball Valve DV – 2900psig Diaphragm Valve |
PRM SERIES Panel Mount Regulator
Key Features
- Single-stage pressure reduction design.
- Used for pure, inert, reactive, flammable, and oxidizing gases and gas mixtures.
- Optional contact pressure gauges to monitor for gas source failure.
- Suitable for laboratory pressure control.
- Custom panel mounting is acceptable.
Specifications (PRM Series)
| Parameter | Details |
|---|---|
| Body Material | 316 Stainless Steel |
| Inlet Pressure | Max 300 bar |
| Outlet Pressure | 0-25 psig (1.7 bar) / 0-50 psig (3.4 bar) / 0-100 psig (6.9 bar) / 0-250 psig (17.2 bar) / 0-2500 psig (172.4 bar) |
| Diaphragm Material (Regulator) | Hastelloy®/ 316 Stainless Steel (standard) |
| Operating Temperature | -40°F to 165°F (-40°C to 74°C) |
| Dimensions (W x H x D) | 320 x 160 x 153 mm |
| Weight | 2.2 KG |
| Inlet / Outlet Ports | 1/4″ FNPT |
| Options | Relief valve, tube fitting |
Product Code Configuration Guide (PRM Series)
| Basic Series | Body Material | Inlet Pressure | Outlet Pressure Range | Inlet Connection | Outlet Connection | Options | Gas Type |
|---|---|---|---|---|---|---|---|
| PRM | S – 316 Stainless Steel | 1 – 4000 psig (276 bar) | 0 – 0-25 psig 1 – 0-50 psig 2 – 0-100 psig 3 – 0-250 psig 4 – 0-2500 psig (NR41 Series) |
4F – 1/4″ NPTF 4N – 1/4″ OD |
4F – 1/4″ NPTF 4N – 1/4″ OD |
R – Relief Valve (NR11 series) | Please specify |
