Manufacturer-Verified Scope
Part numbers and assembly relationships are restricted to the live category and Titan Commander documentation.
Diagnosis Before Replacement
Troubleshooting directs inspection of genuine components before ordering.
Active Product Selection
The replacement-parts section contains 5 live product links and does not exceed six cards.
Verified Commander Links
Navigation uses confirmed Commander machine-family and assembly destinations.
Assembly Overview
The 944-620 valve consists of knob 944-005, lock nut 860-721, valve stem 944-023, valve body 944-020, PTFE O-ring 944-004, stem stop 944-026, tungsten-carbide ball 569-170, copper gasket 945-003 and tungsten-carbide seat 944-904. Kit 944-050 contains the O-ring, ball and copper gasket.
Functions Supported by the Assembly
Controlled Pressure Relief
The knob and stem position the ball-and-seat system to open or close the bleed path.
High-Pressure Sealing
The tungsten-carbide ball, seat and copper gasket create the principal internal sealing interface.
Stem Leakage Control
The 944-004 PTFE O-ring seals around the valve stem.
Travel Limitation
The 944-026 stem stop limits stem travel and must be removed before extracting the stem.
Service Applications
Use this page for bleed-valve leak diagnosis, pressure-relief restoration, priming complaints, valve-stem service, ball-and-seat inspection, gasket replacement and 944-050 service-kit planning.
High-Value Replacement Parts
Only active products shown on the supplied category and confirmed in Titan documentation are linked below.
Verified live product
View Titan 944-020Titan 944-020 Valve Body
Precision-machined body that houses and aligns the 944-620 internal components.
Verified live product
View Titan 944-004Titan 944-004 PTFE O-Ring
Chemical-resistant stem seal that prevents leakage around the valve stem.
Verified live product
View Titan 944-026Titan 944-026 Valve Stem Stop
Limits valve-stem travel and must be removed before stem extraction.
Verified live product
View Titan 945-003Titan 945-003 Copper Gasket
Compressible sealing gasket installed between body and seat.
Verified live product
View Titan 944-904Titan 944-904 Tungsten Valve Seat
Tungsten-carbide sealing surface for the documented 569-170 ball.
Buying Guide
1. Confirm the valve
Verify the installed assembly is 944-620.
2. Identify the leak path
Separate stem leakage from ball-and-seat leakage.
3. Consider service kit 944-050
The kit contains O-ring 944-004, ball 569-170 and gasket 945-003.
4. Inspect hard components
Replace body, stem stop or seat only after confirming damage.
Maintenance
Relieve all system pressure before service. Open the knob fully counterclockwise before unthreading the seat. Remove the stem stop with a socket screwdriver before extracting the stem. Inspect the O-ring, ball and copper gasket during service.
Repair Planning
Document whether leakage occurs around the stem, through the closed valve or at the body-to-seat joint. Inspect the ball, seat, gasket, O-ring, stem and threads in sequence. Use service kit 944-050 when its sealing components are worn.
Fast Navigation
Frequently Asked Questions
What type of page is this?
It is an exploded pressure-bleed valve assembly replacement-parts page.
Which parts make up 944-620?
Titan documents 944-005, 860-721, 944-023, 944-020, 944-004, 944-026, 569-170, 945-003 and 944-904.
What is in service kit 944-050?
Titan lists O-ring 944-004, ball 569-170 and gasket 945-003.
What should be replaced when the closed valve leaks?
Titan states that the ball should be replaced when leakage occurs; inspect the seat before replacing it.
Does the seat require frequent replacement?
No. Titan states that the tungsten-carbide seat should not require frequent replacement.
Why open the knob before removing the seat?
Titan requires the knob to be fully counterclockwise before the seat is unthreaded.
How is the stem removed?
The stem stop must first be unthreaded with a socket screwdriver.
When should the O-ring be replaced?
Replace it when stem leakage occurs or it is cut, flattened, chemically damaged or deformed.
Can the copper gasket be reused?
Replace it when crushed, hardened or damaged and inspect it whenever the valve is serviced.
What causes poor priming or relief?
A worn ball, damaged O-ring, blocked path, damaged seat or incorrect stem travel can interfere.
What information is needed to order parts?
Use the Commander model, 944-620 assembly number, item number, part number and leak location.
Why diagnose before replacing the valve?
The assembly contains individually serviceable seals, ball, gasket, stem components and seat.
Identify the Correct Commander Part Before Ordering
Use the machine, assembly diagram, item number and symptom together to reduce mismatched orders.
Search using:
- Complete Commander model number
- Assembly and diagram item number
- Titan part number
- Operating symptom or component name
