3A,4A

2025-12-09

OLK Air Pilot Valve Demo (English Version)

OLK Air Pilot Valves Interactive Demo

3A Series (3/2 NC - Normally Closed)

A

P

R

A

P

R

Current: Spring Return (Outlet A → Exhaust R)

3A Series (3/2 NO - Normally Open)

A

P

R

A

P

R

Current: Spring Return (Inlet P → Outlet A)

4A Series (5/2 Single Pilot)

A

B

R

P

S

A

B

R

P

S

Current: Spring Return (P→A, B Exhausts)

4A Series 30C (5/3 Closed Center)

A

B

R

P

S

A

B

R

P

S

A

B

R

P

S

Current: Center Closed (A & B Blocked)

4A Series 30E (5/3 Exhaust Center)

A

B

R

P

S

A

B

R

P

S

A

B

R

P

S

Current: Center Exhaust (A→R, B→S)

4A Series 30P (5/3 Pressure Center)

A

B

R

P

S

A

B

R

P

S

A

B

R

P

S

Current: Center Pressure (P→A, P→B)

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Difference Between the Three Valve Types of 5/3 Solenoid Valves

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