FISHER TYPE 99LD DIFFERENTIAL PRESSURE REGULATOR
Rp123000.00
The Fisher Type 99LD is a direct-operated differential pressure regulator engineered for precise pressure differential control in industrial gas and liquid systems. Designed with a spring-loaded diaphragm and pressure-loading capability, the Type 99LD regulator provides accurate differential pressure regulation, rapid response, and stable operation under varying process conditions.
The Fisher 99LD is widely applied in fuel gas systems, steam applications, nitrogen purging, process chemical systems, and industrial utility services where maintaining a constant pressure differential is critical for system stability and equipment protection.
General Specifications
Description | Specification |
|---|---|
Product Type | Differential Pressure Regulator |
Model | Fisher Type 99LD |
Manufacturer | |
Regulator Type | Direct-Operated |
Body Sizes | 1/4 in. to 2 in. |
End Connections | NPT Threaded / Flanged / Socket Weld |
Body Materials | Cast Iron, Carbon Steel, Stainless Steel |
Maximum Inlet Pressure | Up to 600 psig (41.4 bar) |
Differential Pressure Range | 2 to 30 psid |
Temperature Capability | Up to 650°F (343°C) depending on trim materials |
Flow Media | Steam, Air, Gas, Water, Oil, Process Chemicals |
Pressure Registration | External |
Shutoff Classification | ANSI/FCI Class IV to VI |
Mounting Position | Horizontal or Vertical |
The 95/99 Series regulators are compact, large-capacity, direct-operated regulators suitable for demanding industrial service applications.
Key Features
Accurate differential pressure control
Compact and rugged industrial design
Fast response to pressure fluctuations
Suitable for steam, gas, and liquid service
High-pressure and high-temperature capability
External pressure registration capability
Excellent stability under varying flow conditions
Easy maintenance and service accessibility
Available in corrosion-resistant materials
Reliable operation for continuous industrial duty
Typical Applications
Differential pressure control systems
Steam distribution systems
Boiler feedwater systems
Nitrogen purging systems
Fuel gas conditioning skids
Process chemical applications
Cooling water systems
Industrial utility systems
Oil & gas process facilities
Operating Principle
The Fisher Type 99LD regulator uses a spring-loaded diaphragm assembly to maintain a controlled pressure differential between upstream and downstream pressure points. As the pressure differential changes, the diaphragm moves the valve plug assembly to regulate flow and restore the desired differential setpoint, ensuring stable process operation.
Advantages
Stable and accurate differential pressure regulation
Rugged construction for severe service applications
Long operational service life
Minimal maintenance requirements
High reliability in industrial environments
Excellent pressure sensitivity and control accuracy
Flexible installation and application capability
Available Configurations
Model | Application |
|---|---|
Type 99LD | Low differential pressure regulation |
Type 99HD | High differential pressure regulation |
Type 99H | High-pressure regulation |
Type 99L | Low-pressure regulation |
