Fisher 167D Switching Valve
167d switching valve
167d
fisher 167d series
type 167d

Fisher 167D Switching Valve

The Fisher 167D two-way instrument air switching valve, featuring a classic direct-acting design and simplified control logic, is engineered for simple, dependable on/off switching. By eliminating unnecessary internal complexity, it enhances reliability and reduces failure risk, making it an ideal choice for basic pneumatic applications where pressure stability is essential.

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Product Introduction

Introduction

The Fisher 167D is a direct-acting two-way instrument air switching valve used to control or switch pneumatic signals in regulator and pneumatic control systems.

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Key Advantages

1. Reliable Switching Performance

Pure two-way flow path enables direct port switching without internal distribution logic, with 1/4″–1/2″ NPT connections for stable pneumatic signal routing.

2. High-Pressure Operating Capability

Handles inlet pressure up to 400 psig (27.6 bar) with a 150 psig diaphragm rating, maintaining controlled switching under pressure variation.

3. Simplified Mechanical Structure

Direct-acting internal sensing mechanism with 3–15 psi to 50–150 psi spring ranges, housed in a compact 0.5 kg carbon-steel body.

Technical Specifications

3.1 General Specifications

Item	Specification
Product Type	Two-way instrument air switching valve
Working Medium	Instrument air or other clean gases
Operating Principle	Direct-acting
Port Connections	Ports A & C: 1/4″ or 1/2″ NPT; Port B and control/exhaust ports: 1/4″ NPT
Pressure Sensing	Internal sensing

3.2 Pressure & Temperature Ratings

Item	Specification
Maximum Inlet Pressure	400 psig / 27.6 bar
Maximum Diaphragm Pressure	150 psig (higher short-term pressure allowed)
Operating Temperature Range	–29 °C to 82 °C (standard); high-temperature seals available

3.3 Set Pressure & Physical Data

Set Pressure Ranges (spring-dependent):

3–15 psi, 5–20 psi, 5–35 psi, 25–60 psi, 40–125 psi, 50–150 psi

(Actual range depends on spring selection and application requirements)

Approximate Weight: 0.5 kg
Body Material: Carbon steel (optional stainless steel components)
Seals: NBR (optional FKM seals for high-temperature service)

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Company strengths

1.Reliable Product Source

All valves supplied are genuine Fisher products with full traceability documentation.

2.Ready Stock Availability

Common models are maintained in inventory for fast order processing and quick shipment.

3.18-Month Warranty Coverage

Each valve is supported by an 18-month warranty for dependable after-sales protection.

4.Professional Technical Support

Engineering support is available for product selection, installation guidance, and application consultation.

5.Flexible Global Shipping

Multiple international logistics options support efficient delivery worldwide.

FAQ

1. What medium is the Fisher 167D designed for?

The valve is designed for instrument air and other clean gases used in pneumatic control systems.

2. How is the switching pressure determined?

Switching pressure is defined by the installed spring, with selectable ranges from 3–15 psi up to 50–150 psi depending on the required control setting.