Reversing the valve action, 1/2” – 2” valve sizes only – Dwyer 38R User Manual
Page 14
Series 38R ••• Self-Acting Temperature Control Valves
Operation, Installation & Maintenance Manual
REVERSING THE VALVE ACTION
Page 14
Direct-Acting valves close with temperature increase and inward stem motion.
On a regulator these valves are used for HEATING.
Reverse-Acting valves close with temperature decrease and outward stem motion.
On a regulator these valves are used for COOLING.
1/2” through 2” Bronze Body valves use the same parts for both versions, and as such
can be changed from one form to the other in most any shop.
1/2” – 2” Valve Sizes Only
Figure 7
Figure 8
Figure 9
Stem moves in to body
to close assembly.
See also other documents in the category Dwyer Accessories for water:
- WD (1 page)
- PRV (2 pages)
- APV (2 pages)
- BPV (2 pages)
- IPV (2 pages)
- PTV (2 pages)
- BAP (2 pages)
- BAP-K (2 pages)
- FD-1 (1 page)
- EBV (2 pages)
- SSR-25 (1 page)
- SSR-312 (2 pages)
- SSR-15 (2 pages)
- VT-200 (4 pages)
- 471B (2 pages)
- ANE-1 (1 page)
- AP2 (4 pages)
- VP1 (2 pages)
- VP2 (4 pages)
- RP2 (4 pages)
- 1205A-5 (4 pages)
- WDPM (4 pages)
- UHH (8 pages)
- UHH-BTG (4 pages)
- DCAL 1000 (4 pages)
- UTG (2 pages)
- 8901 (20 pages)
- 8904 (19 pages)
- 8912 (20 pages)
- 9671 (19 pages)
- AFH2 (16 pages)
- DDA (2 pages)
- DDC (2 pages)
- DDB (2 pages)
- DDD (2 pages)
- 2700 (4 pages)
- 2800 (4 pages)
- 2900 (4 pages)
- EPTA (2 pages)
- Mark (28 pages)
- QV (2 pages)
- DT (1 page)
- VPS (2 pages)
- VPI (2 pages)
- VPT (4 pages)