The Belimo Z2100QS-K is a 2-way, 1" sweat ZoneTight (QCV) zone valve with a forged brass body, chrome plated brass ball, Cv 8.2, 75 psi close-off and 0% leakage. It accepts Belimo CQB(X) non-fail-safe and CQKB(X) electronic fail-safe actuators, sold separately.
Specifications per Belimo Z2100QS-K technical data sheet (2024-06-12).
Best for
- Unit ventilators, fan coil units and VAV reheat coils
- Fin tube casing, radiant panels and duct coils
- Closed chilled-water and hot-water systems, up to 60% glycol
- Building an assembly with a CQB(X) or CQKB(X) actuator
Key Features
Zero-leakage ball valve
Chrome plated brass ball with PTFE seat and EPDM O-rings for 0% leakage.
Field-adjustable Cv
End stop clip on the actuator gives selectable end stop settings from Cv 0.5 to 8.2.
75 psi close-off
75 psi close-off with 40 psi maximum differential and 360 psi body rating.
Forged brass sweat body
1" [DN 25] sweat connection, equal-percentage flow, flow in both directions.
Snap-fit actuator mount
Mates with CQB(X) and CQKB(X) actuators without tools, in 180° increments.
Maintenance-free
Ball valve requires no routine servicing; installing a suitable strainer is recommended.
ZOT Supply is an authorized distributor of Belimo products.
Technical Specifications
| Specification | Value |
|---|---|
| Valve Model | Z2100QS-K |
| Valve Series | ZoneTight (QCV) zone valve |
| Valve Size | 1" [DN 25] |
| Pipe Connection | Sweat |
| Flow Pattern | 2-way |
| Cv (full open) | 8.2 |
| Field-Adjustable Cv | Selectable end stop settings, Cv 0.5 to 8.2 |
| Flow Characteristic | Equal percentage |
| Leakage Rate | 0% |
| Body Pressure Rating | 360 psi |
| Close-off Pressure | 75 psi |
| Max. Differential Pressure | 40 psi |
| Fluid | Chilled or hot water, up to 60% glycol |
| Fluid Temperature | 36...212°F [2...100°C] |
| Valve Body | Forged brass |
| Ball | Chrome plated brass |
| Stem | Brass |
| Stem Seal | EPDM O-ring |
| Seat | PTFE, O-ring EPDM |
| Flow Direction | Both directions |
| Installation Orientation | Upright to horizontal (not stem down) |
| Servicing | Maintenance-free |
| Valve Weight | 1.2 lb [0.54 kg] |
| Suitable Actuators, Non-Fail-Safe | CQB(X) |
| Suitable Actuators, Electronic Fail-Safe | CQKB(X) |
| Actuator | Not included (valve only) |
Documentation
Belimo Z2100QS-K Valve Technical Data Sheet Belimo CQ Actuator with ZoneTight Valve Installation Instructions Belimo CQK Actuator with ZoneTight Valve Installation Instructions Belimo ZoneTight Valve Brochure Belimo Zone Valve Guide SpecificationFrequently Asked Questions
Does the Belimo Z2100QS-K include an actuator?
No. The Z2100QS-K is the valve body only; it accepts CQB(X) non-fail-safe and CQKB(X) electronic fail-safe actuators.
What is the Cv of the Z2100QS-K?
Cv 8.2 at full open. The actuator end stop clip positions limit maximum flow to Cv 0.5, 0.9, 1.5, 2.2, 3.1, 4.3, 6 and 8.2 with no end stop.
What close-off pressure is it rated for?
75 psi close-off, 40 psi maximum differential pressure and a 360 psi body pressure rating.
What fluids and temperatures can it handle?
Chilled or hot water with up to 60% glycol, at fluid temperatures of 36...212°F [2...100°C].
What are the valve materials?
Forged brass body, chrome plated brass ball, brass stem, EPDM O-ring stem seal and PTFE seat with EPDM O-ring.
How should the valve be oriented?
Upright to horizontal in relation to the stem, never stem down. Flow is possible in both directions.
- Valve Pattern:
- 2-Way
- Valve Size:
- 1 Inch
- Connection Type:
- Sweat
- CV Rating:
- 8.2
- Max Close-Off Pressure:
- 75 psi
- Max Operating Pressure:
- 360 psi
- Medium Temperature Range:
- 36-212 °F
- Body Material:
- Forged Brass
- Actuator Type:
- Valve Only
